Fain, the Broker, Puppeteer Clique, and Ashnod's Altar

Prerequisites

• Fain, the Broker on the battlefield
• Puppeteer Clique on the battlefield
• Ashnod's Altar on the battlefield
• Puppeteer Clique does not have a -1/-1 counter on it
• Fain does not have summoning sickness
• An opponent has at least one creature card in their graveyard

Steps

1. Activate Ashnod's Altar by sacrificing Puppeteer Clique, adding
2. Puppeteer Clique dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Puppeteer Clique enters the battlefield, putting any creature card from an opponent's graveyard onto the battlefield under your control
4. Activate Fain's second ability by tapping it and removing the -1/-1 counter from Puppeteer Clique, creating a Treasure token
5. Activate the Treasure token by tapping and sacrificing it, adding
6. Activate Ashnod's Altar by sacrificing the creature your opponent owns, adding
7. Activate Fain's fourth ability by paying , untapping it
8. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers