Enduring Renewal + Intruder Alarm + Phyrexian Altar

WU identity

Commander legal

The 3 combo pieces

What must be in place

You have at least one creature card in hand.
Creatures you control can tap to produce enough mana to cast the creature card minus one colored mana.
You are able to cast the creature card in hand.

How to execute it

  1. Activate all mana-producing creatures you control by tapping them, adding at least {1}.
  2. Cast the creature card by paying its mana cost.
  3. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  4. Activate Phyrexian Altar by sacrificing the creature, adding one mana of any color.
  5. When the creature dies, Enduring Renewal triggers, returning the creature to your hand from your graveyard.
  6. Repeat.

What the combo produces