Sadhi, the Last Inventor

+1: Create a 1/1 colorless Servo artifact creature token. Then if you control three or more Servos, sacrifice it.
-2: Sacrifice two Servos. If you do, destroy two target nonartifact permanents.
-8: Put 1 Loyalty counter on each creature. Each creature becomes a Planeswalker with '0: You lose 3 life. Activate this ability each turn if able.'