Laluzi
Skeletron
The wiki says both become uncommon, but I've been parked in an underground ice arena for an extremely long time. Shaving off a few tally-counter kills that might have taken place at the start of hardmode, I've used this arena to kill 1500 ice tortoises, 2800 icy mermen, 2850 armored skeletons, 230 cyan beetles, and maybe 900 snow flinxes. This arena has yielded 4 frozen keys, which is actually pretty unlucky for the amount of death that's taken place here. Point being, I've been here long enough to filter out RNG from the equation. I've gotten dozens of nymphs and undead miners.
In all of this time, I haven't seen a single spiked ice slime or ice bat. Plenty of giant bats and even a few cave bats, but no ice bats. Meanwhile, I have an identical arena in pre-hardmode which spawns these enemies quite regularly.
If the spawn rates for these truly are zero, I think they should be slipped back in, with about the same frequency as hardmode undead Vikings. I understand why Wall Creepers obsolete, but in this case it feels like a loss of diversity rather than a difficulty spike. (Nor do analogous enemies like hellbats or spiked jungle slimes ever vanish from the game.)
In all of this time, I haven't seen a single spiked ice slime or ice bat. Plenty of giant bats and even a few cave bats, but no ice bats. Meanwhile, I have an identical arena in pre-hardmode which spawns these enemies quite regularly.
If the spawn rates for these truly are zero, I think they should be slipped back in, with about the same frequency as hardmode undead Vikings. I understand why Wall Creepers obsolete, but in this case it feels like a loss of diversity rather than a difficulty spike. (Nor do analogous enemies like hellbats or spiked jungle slimes ever vanish from the game.)