Buer, Death's Philosopher

Double Strike, Indestructible.
At the beginning of your upkeep, Pay 2 Life. If you don't, bury Buer, Death's Philosopher.
Whenever a non-token black creature you control attacks, you may put a Black White 4/4 Flying Lifelink Spirit token onto the battlefield tapped and attacking. If you do, you pay 1 life for each token made this way.