Mikaeus, the Unhallowed + Ashnod's Altar + Furystoke Giant

Mikaeus, the Unhallowed

Ashnod's Altar

Furystoke Giant

How it works

1. Activate Ashnod's Altar by sacrificing Furystoke Giant.
2. When Furystoke Giant dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Activate Ashnod's Altar by sacrificing Furystoke Giant.
4. When Furystoke Giant dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
5. Repeat.