Goldspan Dragon + Jan Jansen, Chaos Crafter + Umbral Mantle + Xorn

RWB identity

Commander legal

The 4 combo pieces

• Goldspan Dragon
• Jan Jansen, Chaos Crafter
• Umbral Mantle
• Xorn

How to execute it

1. Activate Jan Jansen's first ability by tapping it and sacrificing an artifact creature, creating three Treasure tokens due to Xorn.
2. Activate three Treasures by tapping and sacrificing them, adding {6} due to Goldspan Dragon.
3. Activate Jan Jansen by paying {3} and untapping it, giving it +2/+2 until end of turn.
4. Activate Jan Jansen's first ability by tapping it and sacrificing an artifact creature, creating three Treasure tokens due to Xorn.
5. Activate Jan Jansen by paying {3} and untapping it, giving it +2/+2 until end of turn.
6. Activate Jan Jansen's second ability by tapping it and sacrificing a Treasure, creating two 1/1 Construct artifact creature tokens.
7. Activate two Treasures by tapping and sacrificing them, adding {4} due to Goldspan Dragon.
8. Activate Jan Jansen by paying {3} and untapping it, giving it +2/+2 until end of turn.
9. Repeat.

What the combo produces

• Infinite colored mana
• Infinite creature LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite Treasure tokens
• Infinite untap of creatures you control
• Infinitely large creature until end of turn