Good question worfer,
So in the biome when you enter, your vision gets depleted (basically u got dusted, like blinded but need the dust glasses which is an optional addition to the ankh shelled making it the dust-proof ankh shield).
You see many caves constantly zigzagging all around the biome with a huge core where they all connect filled with dust altars where a bunch of dust spirits arise chasing you and you fending back until you end up in the center of that huge core, where the dust spirits jump into what looks like a bunch of spore clouds from the chlorophyte spear but brown, which is solidified dust (the wasteland counterpart of crimson hearts and shadow orbs),and when you break them you can get the dust wand, which sprays a dust cloud that blinds your opponents (32 damage,average speed),the rusty spear(27 damage, fast speed),dust gun(insanely fast speed,27 damage),solidified dust(item),and the dust glasses (which cures dusted effect).
And these trees are withered and more brittle so it’s easier to break, and drops petrified wood, but it’s sharper, so is better than all other wood types, so better bring your axe!
And then you break the solidified dust, which spawns the dust wizard, which moves very fast, and has a bunch of brittle balls, which do 23 damage on impact, and also releases third eye spirits which are stronger editions of demon eyes (by 1.5x)and when you defeat him he unleashes his one last attempts at killing you by releasing 20 forth eyes(2x stronger than demon eyes and drops dusty bars(as strong as cobalt).
And as soon as you go back,you are welcomed with a horde of dust zombies (2x stronger than regular zombies) and dust spirits.So I guess it was worth crossing the ocean with a water walking potion because when you are about to leave,a chest with a water walking boot awaits you!
Recommended armor and weapons:Best armor you can get in hardmode, probably molten armor, molten fury, night’s edge,flamarang,perhaps jester arrows to fend off the swarms of monsters awaiting you becoz of the piercing and it’s strength.
And feel free to ask any question and i’ll try my best to awnser them and worfer,ask your questions about hardmode if you want I will answer them,and i’ll One back in a while to awnser the questions and see you next time!