Woe Strider + Kithkin Spellduster + Hardened Academic

Woe Strider

Kithkin Spellduster

Hardened Academic

How it works

1. Activate Woe Strider by sacrificing Kithkin Spellduster.
2. When Kithkin Spellduster 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 Kithkin Spellduster.
4. Resolve the Woe Strider ability.
5. Repeat.