Doubling Cube + Karn, Silver Golem + Umbral Mantle

Mana needed: {10}

C identity

Commander legal

The 3 combo pieces

• Doubling Cube
• Karn, Silver Golem
• Umbral Mantle

What must be in place

Doubling Cube does not have summoning sickness.

How to execute it

1. Activate Karn by paying {1}, causing Doubling Cube to become an artifact creature until end of turn.
2. Activate Umbral Mantle's equip ability by paying {0}, attaching it to Doubling Cube.
3. Float at least {10} in your mana pool.
4. Activate Doubling Cube by paying {3} and tapping it, adding at least {7}.
5. Activate Doubling Cube by paying {3} and untapping it, giving it +2/+2 until end of turn.
6. Repeat from step 4.

What the combo produces

• Infinite mana creatures you control can produce
• Infinite mana permanents you control can produce
• Infinite untap of creatures you control
• Infinitely large creature until end of turn