Concordant Crossroads + Sanctum Weaver + Shimmering Wings + Vesuvan Duplimancy

GU identity

Commander legal

The 4 combo pieces

• Concordant Crossroads
• Sanctum Weaver
• Shimmering Wings
• Vesuvan Duplimancy

How to execute it

1. Activate Sanctum Weaver by tapping it, adding at least {U}{U}{U}.
2. Cast Shimmering Wings by paying {U}, targeting Sanctum Weaver.
3. Vesuvan Duplimancy triggers, creating a token copy of Sanctum Weaver.
4. Activate the Sanctum Weaver token by tapping it, adding at least {U}{U}{U}{U}.
5. Activate Shimmering Wings by paying {U}, returning it from the battlefield to your hand.
6. Repeat from step 2.
7. Once you have infinite mana, you may instead target any other creature you control to get infinite nonlegendary copies of that creature.

What the combo produces

• Infinite colored mana
• Infinite creature tokens with haste
• Infinite ETB
• Infinite nonlegendary copies of creatures you control
• Infinite storm count