Necrosynthesis + Pentavus + Phyrexian Altar

Mana needed: {1}

B identity

Commander legal

The 3 combo pieces

What must be in place

Necrosynthesis attached to Pentavus.
Pentavus has at least two +1/+1 counters on it.

How to execute it

  1. Activate Pentavus' first ability by paying {1} and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
  2. Activate Phyrexian Altar by sacrificing the Pentavite, adding {1}.
  3. The Pentavite dies, triggering Pentavus, putting a +1/+1 counter on itself.
  4. Repeat.

What the combo produces