Mikaeus, the Unhallowed, Blasting Station, and Puppeteer Clique

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Blasting Station on the battlefield
• Puppeteer Clique on the battlefield

Steps

1. Activate Blasting Station by tapping it and 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 and Blasting Station trigger
4. Resolve the Puppeteer Clique trigger, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control
5. If you put a creature onto the battlefield this way, when it enters, Blasting Station triggers, untapping Blasting Station
6. Resolve the Blasting Station trigger from step 3, untapping it
7. Resolve the Blasting Station ability from step 1
8. Activate Blasting Station by tapping it and sacrificing Puppeteer Clique
9. When Puppeteer Clique dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
10. Repeat steps 3 through 6 once
11. Resolve the Blasting Station ability from step 8
12. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite damage
• Infinite death triggers
• Infinite sacrifice triggers
• Put all creature cards from each opponent's graveyard onto the battlefield under your control
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control