Mox Amber + Retraction Helix + Rona, Herald of Invasion // Rona, Tolarian Obliterator

UB identity

Commander legal

The 3 combo pieces

• Mox Amber
• Retraction Helix
• Rona, Herald of Invasion // Rona, Tolarian Obliterator

What must be in place

Rona does not have summoning sickness.

How to execute it

1. Activate Mox Amber by tapping it, adding {U}.
2. Cast Retraction Helix by paying {U}, targeting Rona.
3. Activate Rona by tapping it, returning Mox Amber from the battlefield to your hand.
4. Cast Mox Amber by paying {0}.
5. Rona triggers, untapping itself.
6. Activate Mox Amber by tapping it, adding one mana of any color among legendary creatures and/or planeswalkers you control.
7. Repeat from step 3.

What the combo produces

• Infinite blue mana
• Infinite mana among colors of legendary creatures and planeswalkers you control
• Infinite storm count