Bloodflow Connoisseur + Carnifex Demon + Mikaeus, the Unhallowed

B identity

Commander legal

The 3 combo pieces

• Bloodflow Connoisseur
• Carnifex Demon
• Mikaeus, the Unhallowed

How to execute it

1. Activate Bloodflow Connoisseur by sacrificing Carnifex Demon.
2. When Carnifex Demon dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect.
3. Resolve the Bloodflow Connoisseur ability
4. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers