Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phyrexian Altar + X-23, Deadly Weapon

WBG identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phyrexian Altar
• X-23, Deadly Weapon

How to execute it

1. Activate Phyrexian Altar by sacrificing the other Mutant.
2. When the Mutant dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When the Mutant enters, X-23 triggers, putting a +1/+1 counter on X-23 and the other Mutant.
4. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers