Blood Bishop

The Blood Bishop is an boss in Diablo IV. He utilizes blood magic.

In-game
The Blood Bishop utilizes a tentacle attack, though is primarily a caster that can cast direct damage and AOE 'bombs' for area denial.

Development
Visually, the Blood Bishop was conceived as a high-level boss based on vampiric blood and magic. The developers wanted to double down on the notion of a heart shape, representing the bishop's use of blood magic. This led to the notion of arteries creating these blood clots that explode to cast the AOE effect design needs.

Trivia

 * Sebastian Stepien has speculated that the Blood Bishop was a (normal) bishop in his earlier life, and did lots of evil things.