Butcher Ghoul + 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.
Butcher Ghoul 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 Butcher Ghoul.
  2. Activate Phyrexian Altar by sacrificing Butcher Ghoul, adding one mana of any color.
  3. When Butcher Ghoul dies, its undying ability and Serrated Biskelion trigger.
  4. Resolve the Serrated Biskelion trigger, untapping it.
  5. Resolve the Butcher Ghoul trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. When Butcher Ghoul leaves your graveyard, Thran Vigil triggers, putting a +1/+1 counter on Serrated Biskelion.
  7. Repeat.

What the combo produces