Metalwork Colossus + Rukarumel, Biologist + Shilgengar, Sire of Famine

WUBRG identity

Commander legal

The 3 combo pieces

• Metalwork Colossus
• Rukarumel, Biologist
• Shilgengar, Sire of Famine

What must be in place

The total mana value of noncreature artifacts you control is at least 11.
Rukarumel on the battlefield with "Angel" chosen.

How to execute it

1. Cast Metalwork Colossus by paying {0}.
2. Activate Shilgengar by sacrificing Metalwork Colossus, creating a number of Blood tokens equal to Metalwork Colossus's toughness.
3. Activate Metalwork Colossus by sacrificing two Bloods, returning it from your graveyard to your hand.
4. Repeat.

What the combo produces

• Infinite Blood tokens
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite storm count