Stalwart Successor + Woe Strider + Putrid Goblin

Stalwart Successor

Woe Strider

Putrid Goblin

How it works

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