Metamorphosis Fanatic + Phyrexian Altar + Saffi Eriksdotter

WBG identity

Commander legal

The 3 combo pieces

• Metamorphosis Fanatic
• Phyrexian Altar
• Saffi Eriksdotter

How to execute it

1. Activate Saffi by sacrificing it, targeting Metamorphosis Fanatic
2. Activate Phyrexian Altar by sacrificing Metamorphosis Fanatic
3. When Metamorphosis Fanatic dies, Saffi triggers, returning Metamorphosis Fanatic from your graveyard to the battlefield.
4. When Metamorphosis Fanatic enters, it triggers, returning Saffi from your graveyard to the battlefield.
5. Repeat.

What the combo produces

• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB