Color Identity: B

Initial Card State
- All permanents on the battlefield (Puppeteer Clique without a -1/-1 counter on it).
Steps
- Activate Phyrexian Altar by sacrificing Puppeteer Clique.
- When Puppeteer Clique dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
- Activate Phyrexian Altar by sacrificing Puppeteer Clique.
- When Puppeteer Clique dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
- When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
- Repeat.
Notes
- You may sacrifice the additional creatures that are returned by Puppeteer Clique, allowing you to infinitely recur them.
Results
- Put all creature cards from each opponent's graveyard onto the battlefield under your control.
- Infinite ETB.
- Infinite LTB.
- Infinite colored mana.
- Infinite death triggers.
- Infinite sacrifice triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).