Mikaeus, the Unhallowed + Puppeteer Clique + Yahenni, Undying Partisan

Prerequisites

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Steps

1. 1Activate Yahenni by sacrificing Puppeteer Clique.
2. 2When Puppeteer Clique dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. 3When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
4. 4Resolve the Yahenni ability.
5. 5Activate Yahenni by sacrificing Puppeteer Clique.
6. 6When Puppeteer Clique dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. 7When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
8. 8Resolve the Yahenni ability.
9. 9Repeat.

Effects

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Put all creature cards from each opponent's graveyard onto the battlefield under your control