Mikaeus, the Unhallowed + Woe Strider + Kithkin Spellduster

Mikaeus, the Unhallowed

Woe Strider

Kithkin Spellduster

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. Resolve the Woe Strider ability.
4. Activate Woe Strider by sacrificing Kithkin Spellduster.
5. When Kithkin Spellduster dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Woe Strider ability.
7. Repeat.