Cubwarden + Enduring Renewal + Killian, Ink Duelist + Phyrexian Altar

Mana needed: {W}{W}

WB identity

Commander legal

The 4 combo pieces

What must be in place

You control a non-Human creature.

How to execute it

  1. Cast Cubwarden for its mutate cost by paying {W}{W}, targeting a non-Human creature you control.
  2. The Cubwarden mutated creature triggers, creating two 1/1 Cat creature tokens.
  3. Activate Phyrexian Altar by sacrificing the Cubwarden mutated creature, adding {W}.
  4. When the Cubwarden mutated creature dies, Enduring Renewal triggers, returning Cubwarden and any cards merged with it from your graveyard to your hand.
  5. Activate Phyrexian Altar by sacrificing a Cat token, adding {W}.
  6. Repeat.

What the combo produces