Woe Strider + Hardened Academic + Obstinate Gargoyle

Woe Strider

Hardened Academic

Obstinate Gargoyle

How it works

1. Activate Woe Strider by sacrificing Obstinate Gargoyle.
2. When Obstinate Gargoyle 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 Obstinate Gargoyle.
4. Resolve the Woe Strider ability.
5. Repeat.