Mikaeus, the Unhallowed, Viscera Seer, and Puppeteer Clique

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Viscera Seer on the battlefield
• Puppeteer Clique on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite scry 1
• Put all creature cards from each opponent's graveyard onto the battlefield under your control