Hardened Academic + Phyrexian Altar + Puppeteer Clique

RWB identity

Commander legal

The 3 combo pieces

• Hardened Academic
• Phyrexian Altar
• Puppeteer Clique

How to execute it

1. Activate Phyrexian Altar 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. Hardened Academic and Puppeteer Clique trigger.
4. Resolve the Hardened Academic trigger, putting a +1/+1 counter on Puppeteer Clique.
5. Resolve the Puppeteer Clique trigger, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
6. Repeat.

What the combo produces

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