Heimerdinger, Wise Inventor

Whenever you cast an instant or
sorcery spell, create a 1/1 colorless H-28
G Evolution Turret artifact creature token.
Sacrifice a Turret: Deal 1 damage to any target.
Sacrifice 2 Turrets: Draw a card.
Sacrifice 3 Turrets: Create a 5/5 Enhanced
Construct creature token.