"Donald Trump's hairpiece" as a mini/hidden boss? It could whirl round like a helicopter to attack and be summoned if the player acquires and uses an imitation french poodle item? If beaten, the player can have Donald Trump himself as an NPC who when talked to shares his "wisdom" on how to run the world (lol)
Adult content? I think some drug or sex references if done in reasonably good taste could possibly be entertaining for adult players, but then we would need a way to seperate such content from younger players.
Magic mushrooms? When consumed then for a short while they would cause enhancement of colours, distortion of vision, perhaps some hallucinations (sprites that appear on the screen that the player would not be able to interact with because they "aren't real"). Since the use recreational drugs is related to setting and mood, perhaps if the player consumed a mushroom in a grass biome with sunshine and sunflowers they would have a "good trip" and see pleasant hallucinations. But if a mushroom is eaten in the corruption/crimson then fake monsters would appear?
Items such as chains, whips you get the idea
For expert mode, the corrution and crimson should spread as it does in hardmode from the very start. Because expert mode isn't hard enough. And to make normal mode easier, the player should be equipped with the flying rocket boots from the start and begin with full health. Instead of hurting the player, slimes should be harmless and drop health potions when killed.
And we need an unbalanced weapon that can be easily acquired from an early stage that is better than every other weapon in the game that makes all other weapons in the game not worth using. And an unbalanced super potion that restores full health, is really cheap and requires no cooldown in effect ensuring the player never dies during battle if he keeps using before running out of heatlh.
Or when starting out, the player should have no items at all. Enemies can be punched (green slimes will need about 20 punches to die) and trees will also need to be punched like in Minecraft (but will need about 100 punches to fall one)
Once entering hardmode, the eye of chutulu should regularly appear as a regular enemy. This means no boss music, more than one can spawn and it will only drop a coin or two once killed.
quote: "Troll NPC added."
I liked the idea. He could break random blocks like you said, and periodically place a corruption or crimson block somewhere. When you have left your base he could steal things from your chest and sell them to the shopkeeper forcing you to buy them back from the shopkeeper if you want them.