Fixed default Piercer splitcoin not ignoring the same target on subsequent splits
Removed most "oops" OOB preventers from 8-3's final section
Fixed Mirror Reaper not having damage resistance to sawblades
Mirror Reaper toxic projectiles now stop tracking the player after 2 seconds
(Hopefully) fixed 8-3 Dimensional Cave getting stuck on the wrong side when the player has cleared out the cave side and then clears out the flesh side right as the portal reaches its destination
Fixed 8-3 elevator to secret softlocking the player if they use a call button on the second floor
Fixed two pillars in 7-3 not having the correct texture