Necrosynthesis + Phyrexian Altar + Scurry Oak

BG identity

Commander legal

The 3 combo pieces

What must be in place

Necrosynthesis attached to Scurry Oak.
You control another creature to sacrifice.

How to execute it

  1. Activate Phyrexian Altar by sacrificing a creature, adding one mana of any color.
  2. Necrosynthesis triggers, putting a +1/+1 counter on Scurry Oak.
  3. Scurry Oak triggers, creating a 1/1 Squirrel creature token.
  4. Activate Phyrexian Altar by sacrificing the Squirrel token, adding one mana of any color.
  5. Repeat from step 2.

What the combo produces