Mikaeus, the Unhallowed + River Kelpie + Yahenni, Undying Partisan

Prerequisites

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Steps

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

Effects

• Infinite card draw
• Infinite draw triggers
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers