Amalgamation: Horrifying fusion of 2 other bosses...
Meat Grinder: Fast spinning sawblade!
Twisted Baby: Egg creating bouncing monstrocity!
Dust Biter: Unpredictable spider creature.
Twisted Cranium: Huge Brain looking for trouble.
Doppelganger: Your reflection ?
Death Ship: Form-changing death machine.
Hydraulic Press: Hardcore thing.
Giga E. Coli: Cowardly bacteria now big and fat.
Brood Queen: Big mama with her gunner babies.
Twisted Ternion: Something is very wrong with it...
Arena Closer: More colours.. And more HELL.
Spike: Is much more angry now.
The Hive: Is an actual threat.
Giga Gunner: Better AI.
Pressy: Slamming pet familiar.
Fortune Cookie: Grants a random common or rare item.
Tormented Soul: Heals when taking damage.
Silver Bullet: Bonus damage against bosses.