Tezzeret, Academy Master

+1: Create 2 1/1 clockwork creature tokens with "When this creature dies, put a +1/+1 counter on target artifact creature"
0: Sacrifice X artifacts, create an X/X Clockwork creature token with "When this creature dies, put X loyalty counters on target planeswalker"
-8: Create X X/X clockwork creature tokens with Haste and Afflict X, where X is the number of artifacts you control