Fain, the Broker + Marrow-Gnawer + Phyrexian Altar + Robaran Mercenaries

WB identity

Commander legal

The 4 combo pieces

What must be in place

Robaran Mercenaries does not have summoning sickness.
You control at least seven Rats.

How to execute it

  1. Activate Robaran Mercenaries using Marrow-Gnawer's ability by sacrificing a Rat and tapping it, creating at least six 1/1 Rat creature tokens.
  2. Activate Phyrexian Altar four times by sacrificing four Rats, adding {3}{B}.
  3. Activate Robaran Mercenaries using Fain's fourth ability by paying {3}{B}, untapping Robaran Mercenaries.
  4. Repeat.
  5. Once you have infinite creature tokens, you may instead activate Fain's first ability to put infinite +1/+1 counters on creatures you control.

What the combo produces