Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phyrexian Altar + Selfless Police Captain

WB identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phyrexian Altar
• Selfless Police Captain

How to execute it

1. Activate Phyrexian Altar by sacrificing Selfless Police Captain.
2. When Selfless Police Captain dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
3. Repeat.

What the combo produces

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