Aphix Penultima Alpha
From Destinypedia, the Destiny wiki
The Alpha is a level 18 Minotaur that spawns inside a small building to the left of the train tunnels. Guardians have five minutes from the moment he spawns to kill him, and he has five checkpoints he will travel to before he despawns. His Void Shield recharges quickly, and will start to restore itself if not damaged every few seconds. He behaves like most other Minotaurs until his health drops low, then he will prioritize fleeing to his checkpoints.
List of appearances