Geralf's Messenger + Phyrexian Altar + Serrated Biskelion + and 2 others

B identity

Commander legal

The 5 combo pieces

What must be in place

Serrated Biskelion does not have summoning sickness.
Thornbite Staff attached to Serrated Biskelion.
Geralf's Messenger does not have more than one +1/+1 counter on it.

How to execute it

  1. Activate Serrated Biskelion by tapping it, putting a -1/-1 counter on it and Geralf's Messenger.
  2. Activate Phyrexian Altar by sacrificing Geralf's Messenger, adding one mana of any color.
  3. When Geralf's Messenger dies, its undying ability and Serrated Biskelion trigger.
  4. Resolve the Serrated Biskelion trigger, untapping it.
  5. Resolve the Geralf's Messenger trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. When Geralf's Messenger enters the battlefield, it and Thran Vigil trigger.
  7. Resolve the Geralf's Messenger trigger, causing an opponent to lose 2 life.
  8. Resolve the Thran Vigil trigger, putting a +1/+1 counter on Serrated Biskelion.
  9. Repeat.

What the combo produces