Urza, Tolarian Hero

Urza enters the battlefield with a number of
loyalty counters on it equal to the number of artifacts you control
Artifacts you cast cost {1} less
Whenever an Artifact enters the battlefield, put
a loyalty counter on urza
+1: create a 4/4 colorless golem Artifact Creature
-3: return target artifact from your graveyard to
the battlefield under your control.
-8: destroy all creatures and planeswalkers
Urza can be your commander