Abhorrent Overlord + Deadeye Navigator + Phyrexian Altar

Abhorrent Overlord

Deadeye Navigator

Phyrexian Altar

How it works

1. Activate Abhorrent Overlord by paying 1, blinking itself.
2. Abhorrent Overlord enters the battlefield, triggering itself and Deadeye Navigator's soulbond ability.
3. Resolve the Abhorrent Overlord trigger, creating a number of 1/1 Harpy creature tokens equal to your devotion to black.
4. Resolve the Deadeye Navigator trigger, repairing it and Abhorrent Overlord.
5. Activate Phyrexian Altar twice by sacrificing two Harpys, adding 1.
6. Repeat.