Urza Chief Artificer

+3: Create a 2/2 Construct Token Creature.
-5: Destroy target creature. If target creature is Phyrexian (has Phyrexian in its name.) you gain 5 life.
-10: Create an 8/8 Karn The Protector creature token, with indestructible, and tap to create a 2/2 Construct token creature.