Bioengineered Future + Krark-Clan Grunt + Metalwork Colossus + The Ooze

RG identity

Commander legal

The 4 combo pieces

What must be in place

Noncreature artifacts you control have total mana value 11 or greater.

How to execute it

  1. Cast Metalwork Colossus by paying {0}, which enters with at least two +1/+1 counters on it due to Bioengineered Future.
  2. Activate Krark-Clan Grunt by sacrificing Metalwork Colossus.
  3. When Metalwork Colossus dies, The Ooze triggers, creating a Mutagen token for each +1/+1 counter Metalwork Colossus had.
  4. Resolve the Krark-Clan Grunt ability.
  5. Activate Metalwork Colossus by sacrificing two Mutagens, returning it from your graveyard to your hand.
  6. Repeat.

What the combo produces