Myr Scrapling + Enduring Renewal + Workhorse

Myr Scrapling

Enduring Renewal

Workhorse

How it works

1. Activate Myr Scrapling by sacrificing itself, targeting Workhorse.
2. Myr Scrapling dies, triggering Enduring Renewal, returning Myr Scrapling from your graveyard to your hand.
3. Resolve the Myr Scrapling ability, putting a +1/+1 counter on Workhorse.
4. Activate Workhorse by removing a +1/+1 counter from it, adding C.
5. Cast Myr Scrapling by paying 1.
6. Repeat.