Grarth, Monstrous Junk

Modular X (This enters the battlefield with X
+1/+1 counters on it. When it dies, you may put its
+1/+1 counters on target artifact.)

Affinity for artifacts (This spell costs {1} less to cast
for each artifact you control.)

Whenever Grarth is dealt damage, create a 1/1 colorless Servo creature token or a Treasure
token