Mikaeus, the Unhallowed + River Kelpie + Bartolomé del Presidio

Mikaeus, the Unhallowed

River Kelpie

Bartolomé del Presidio

How it works

1. Activate Bartolomé del Presidio by sacrificing River Kelpie.
2. When River Kelpie dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When River Kelpie enters, its first ability triggers, causing you to draw a card.
4. Resolve the Bartolomé del Presidio ability.
5. Activate Bartolomé del Presidio by sacrificing River Kelpie.
6. When River Kelpie dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. When River Kelpie enters, its first ability triggers, causing you to draw a card.
8. Resolve the Bartolomé del Presidio ability.
9. Repeat.