The Razorback would be a fast moving boss, sort of akin to the KF, but he would have powerful slash attack and be able to form into a ball and roll over you with his spiked back.

He would have 3 phases:

Phase 1 (100-50% health): Normal slash and roll attacks.

Phase 2 (50%-10% health): Gains shields and enters a frenzied state. Targets a player and chases them. If he grab hold of them, he bites them, taking a big portion of their health while restoring some of his.

Phase 3 (10% to dead): Gains another shield, and frenzies.

He spawns in Gorefasts and Gorefiends once he gets below 50% HP.

Lemme know what you think.