PC How to beat each boss if you've given up hope (simple tricks)

mathbrush

Terrarian
I've found that for each boss there are generally a few things you can do that will make life much easier for you. After beating my head against some bosses over and over (especially on Expert and Master mode), I've found a few tricks that help quite a bit.

King Slime
The simple trick here is mobility. Make a long row (100+ blocks long) of platforms about the height of the smaller treetops (i.e. 10-15 blocks high) in the flat area near your spawn, possibly two rows if it helps. Make sure you have a jump accessory (like a cloud in a bottle). Then run away from King Slime along your platform, attacking him from above. If he hops up, hop down so he follows you then go back on your platform in the other direction. Melee can use longer-range items like Storm Spear, Enchanted Boomerang, or Flails, while rangers can use Frostburn arrows (or Minishark) and mages can use staves. Summoners do pretty well with just a leather whip and a flinx staff.

Eye of Cthulhu
Using a platform like the one above for King Slime is great here, especially if it has two rows you can jump quickly between. For phase 1, have something that can pierce through the eyes (like a spear, whip, jester's arrows or ruby staff). For the second phase, the great secret here is to use Bone Javelins. They do big damage, are slow and wide so it's easy to hit the 'crazy charging' that happens in Expert mode, and getting them usually makes it easy to make Fossil Armor which further enhances their strength.

Eater of Worlds

Even in Expert Mode, the difference between success and failure is often related to slight adjustments to defense and offense. You reach a critical point where suddenly each segment does almost 0 damage and you get healed from the hearts. To get to this point, it's useful to have a Bast statue, ironskin potion (which you can make with putting a glass bottle on a table and creating things there), and good armor. For DPS, having a flail dropped on the ground will kill it quickly, or using Thorns potion. Don't fight it aboveground, where it shoots more spit in Expert mode, and use your hook if you get 'stuck'. It can also help to build a flat platform before the fight.

As a complete last resort, if you can find a Terragrim, it chews up this boss in seconds on any mode.

Brain of Cthulhu

The arena is important here. It's good to take the whole crimson 'heart' and stretch platforms across it. Knockback will help you a lot, and (in particular) having a summoner hybrid run with two flinxes or vampire frogs and a whip is great, since they'll knock everything away from you and will find the 'right' brain in the final section. If you find yourself dying a ton, the panic necklace will help you escape and thorns potion will make creepers kill themselves.

Skeletron

Featherfall potion (and Shield of Chthulhu) make this a joke in Expert mode. You fly up and around him in a big circle over and over. The Ballista staff from OOA is perfect here, as is the Crimson Rod, and a Space Gun, Starfury, Thorn Chakram or similar high-damage weapon will take him down quickly.

Queen Bee

First, knowing you can make Abeeminations makes it so much better (instead of searching for new hives). Getting a good arena matters here, too; if the hive is small, dig out a big space and line it with horizontal platforms that are one 'jump' high (about 5 blocks). When she charges, just hop up and down. Your work won't be wasted since you can craft more abeeminations and since you can use the arena later for Plantera.

The sentries from Old One's Army are invaluable here. The Lightning rod, if placed around you, kills all bees she releases automatically, and the ballista is great for when she is charging since it hits her face on. Waterbolt is probably the best way to kill here, but don't use quickly-attacking things like Minigun or flinxes unless you have a way of dealing with her high defense (like Sharktooth necklace).

Wall of Flesh
Water walking potion, obsidian potion, featherfall potion, and you'll be fine, starting from the edge of the world.. You don't even need a bridge, just check the path once to make sure nothing is in the way. The best weapons are probably things like Starfury (if you stay low and hit the eye directly), Demon Scythe, Bee's Knees/Hellwing Bow, or Obsidian Armor with Spinal Tap. If you do magic then try the wizard set with Demon Scythe.

Biome Mimics
The trick here is to make your own mimics by collecting 15 souls of light or night and making a key at a workbench. Fighting them aboveground on a flat arena makes it a lot easier, especially when using the Queen Spider Staff.

Queen Slime
One trick that significantly decreases her difficulty is to fight her over the ocean using Water Walking boots or potion. It keeps all her projectiles from bouncing and slows them down when she is submerged. While many people have had success with the Daedalus Stormbow, I find the Dart weapons very effective against her (especially Ichor darts).

The Destroyer
If you've defeated another mech, grab the Tome of Infinite Wisdom from the Old One's Army Tier 2. Run away from the destroyer on flat land and cast the whirlwind over and over. The destroyer will be done in < 20 seconds.

Otherwise, the main technique is to build a box or platforms high up in the air where the destroyer can almost but not quite reach it, and keep a row of platforms in part of the bottom of the box. Then attack with piercing or area weapons (like holding down the Dao of Pow or Drippler Crippler, using Cool Whip, the Daedalus Stormbow or the ever-effective ichor darts).

The box should have at least one side and at least a partial ceiling to keep most probe lasers away until they get through the walls. A weapon that sweeps through an area helps with probes (Whips, Chain Guillotines, Crystal Serpent or a Spell tome, Darts, etc.).

Using the queen slime mount means that the Destroyer head will sometimes bounce you up instead of hurting you.

The Twins

A long skybridge, running away (with unicorn mount or boots) and firing behind you is probably the easiest thing to do here. When Spazmatism charges you, you can reverse directions. Again ichor darts are a cheap and effective option, or using the Light Discs, Phantom Phoenix, Megashark, etc. if another mech boss is defeated).

If you just can't dodge Spazmatism's second stage, you can (if you've defeated another boss) set up a teleporter arena with one teleporter at each end, allowing you to go back and forth.

If Retinazer is alone in the second stage, you can just hide in a box and be completely invulnerable (make sure you have walls on sides and roof). Meteor staff, daedalus stormbox, or summons can finish it off.

Skeletron Prime

Just like Skeletron, it's all about mobility. Fighting over the ocean with water walking or Terraspark makes the bombs much less dangerous. The Queen Slime Mount or Pixie Wings allow you to circle around Skeletron Prime (Queen Slime mount even lets you bounce off his head). Again Ichor Darts (or Crystal Darts) make this an easier fight.

Plantera

One specific type of arena makes Plantera easy. On one side of the jungle, make an arena about the size of your screen or slightly larger, with rows of platforms every ten blocks or so. Mining this out is very hard with enemies, so placing their banners and/or peace candles makes this step a lot easier. Having water at the bottom of the arena helps the bouncy thorns not hurt.

From the bottom corner of the arena dig a straight tunnel to the other side of the jungle, enclosing it completely so less enemies get into it.

During the main fight in the big arena, circle around Plantera, using a solid weapon like (again) Ichor darts, or Death Sickle, Yelets with Yoyo bag, Venom Staff, Phantom Phoenix/Chlorophyte Shotbow, etc. The circling motion keeps the seeds from hitting you.

Once phase two starts, head down your tunnel (if you can't get past Plantera, use the Obsidian Shield or even a bed with a magic mirror to get through). Plantera is slowed down a lot in tunnels. Just blast away; weapons that can pass through walls like Death Sickle or Whips are best.

Golem

There are a lot of techniques for defeating Golem out there. One easy one is to use Huntress Armor, three Explosive traps, the Firecracker whip and a desert tiger staff (with a summoning table).

Other great techniques include switching between Spectre Mask and Hood or using Vampire Knives in conjunction with Death Sickle. Getting hit isn't so bad if you can heal right away.

Pumpkin Moon/Frost Moon

The Terra Blade is excellent both for clearing out minions and bosses from a distance. Both of these events are a lot easier in Expert Mode if you kill Mourning Woods first and get a Witch's Broom. Then flying around with the Terra Blade (for damage) or Possessed Hatchet (for safety) should be enough to kill a few Pumpkings or Ice Queens. For Santa NK1's, flying in an arc (like a rainbow) can avoid most of the machine gun.

For extreme safety, switching between Specter Hood and Specter Mask or using Vampire Knives will keep you going strong.

Duke Fishron/Empress of Light

These bosses are very similar. And both of them are much easier with Life Steal and a flying mount (like Witch's Broom or the UFO Car Key). Homing weapons let you focus on dodging. Despite the great amount of hate it receives for its DPS, I've used Possessed Hatchet (with flasks) to easily defeat them in Expert and Master Mode. The Spectre Staff or Bat Scepter are great for magic users, and Chlorophyte bullets for Rangers.

For Duke Fishron specifically, inferno potion can block most of the bubbles (fish in Lava by crafting a lavaproof bugnet and catching fiery bugs). Fly around in a zigzag pattern (using diagonal movement is faster). Stay away from the ocean surface as that's where the whirlwinds spawn. If you don't have enough DPS to beat him in the third, final stage, fly to the top of the map and then fall, moving left and right to dodge his charges. The Neptune's Shell or its tinkers actually make you faster in water than out of it, so if you fall into the ocean at the very end it can help your mobility.

For the Empress of light, move diagonally away from her every time she moves. That way you can avoid Sun Dance and the spiral. When she shoots the homing lights, move in a checkmark shape, diagonally down and then up again at the very end. When she uses her ethereal lances, move in a large circle through the lances.

Old One's Army

Two tips here are that summon damage affects sentries and that saving up for medals is excellent. Tiers 2 and 3 are much easier if you saved up enough medals for a weapon.

Lightning and Explosive sentries do better at the portals themselves and Ballista and Flameburst do better in the middle 1/3 of the map.

Wyverns are the most dangerous enemies. Placing a row of platforms 15 blocks above the crystal and placing ballistas there helps a ton. Keeping a row of platforms over the whole field and using it to place a Queen Spider Sentry over one of the portals helps a ton.

If you can make it through most waves but not the boss, save up medals as you die and buy the strongest Tavernkeep armor you can, piece by piece, especially the ones with increases to minion damage. Each piece makes your sentries stronger, and the full armor is just about as good as hallowed (for Tier 1) and Beetle/Shroomite (for tier 2). Mixing and matching is especially good; I used Dark Artist armor except with the Hallowed Headpiece against Master Mode Moon Lord and Red Riding Armor with one of the Shroomite headpieces is incredible.

For Betsy herself, it's good to put all sentries near the center after Round 5. There's a guy on the wiki who hates this advice, but honestly the easiest way for me to beat Betsy is to use Tavernkeep armor (so the sentries kill most other enemies), and fly around Betsy at a safe distance using the Possessed Hatchet. The homing weapon kills off stray Drakins and the Wyverns she makes, and flying above her often makes her target the crystal less. It is much less DPS than other weapons, but it works just great. As an alternative, using Magic and blasting Betsy with the Laser Machinegun or similar weapon is also effective (ranged does great with Snowman Cannon or Tsunami with venom arrows).

Martian Invasion

The martian saucers always shoot to the side with lasers, then any direction with homing rockets, then down with a laser ray. Moving around it in a circle is great, making sure not to be underneath right after the rockets.

For stage 2 in Expert/Master mode, simply moving left and right is enough to defeat it. You have to get a sense of the rhythm, turning back a couple of seconds before the beam turns off, passing to the other side before it turns back on.

Celestial Pillars

Again, I love the possessed hatchet here (low DPS but kills everything). Snowman cannon with cluster rockets (only time they're really useful) is also good. Lifesteal with Vampire Knives or Spectre Hood is also great.

Moon Lord

The Moon Lord is just hard. The only real tip I have for people who are really stuck on the second phase is that if you wait for the rain, the Shrimpy Truffle mount is so fast that you can circle around the Moon Lord while remaining completely out of range of the True Eye of Cthulhu's little phantasmal death rays. You'll need some great homing weapons at that distance (or good aim).

Hope this helps! Feel free to share your own tips (especially for Queen Slime and Moon Lord, they're nasty).
 
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