The Abomination

The Abomination is an upgraded version of The Amalgamation, and only spawns on wave 7 of Omega Boss Rush. Because of this, you will always be fighting him as Soldier.

Attacks
Melee - Punches you for 150 damage.

Abominable Roar - Roars, doing 75(?) damage to everyone nearby.

Summon - Summons 4 Orbs of Chaos that deal 15/25 damage to the closest player.

Glitched Teleport - Teleports around the current player, before attempting to melee them for 150 damage.

Tips
Roll when he does his teleport attack to dodge the hit at the end.

He likes to use his teleport move frequently, so watch your stamina if attempting to kite him.