Woe Strider + Rendclaw Trow + Hardened Academic

Woe Strider

Rendclaw Trow

Hardened Academic

How it works

1. Activate Woe Strider by sacrificing Rendclaw Trow.
2. When Rendclaw Trow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic triggers, putting a +1/+1 counter on Rendclaw Trow.
4. Resolve the Woe Strider ability.
5. Repeat.