Isochron Scepter + Narset's Reversal + Seedborn Muse + and 2 others

GU identity

Commander legal

The 5 combo pieces

• Isochron Scepter
• Narset's Reversal
• Seedborn Muse
• Teferi, Mage of Zhalfir
• Time Stop

What must be in place

Nonland permanents that can be tapped for at least {6}{U}{U}.

How to execute it

1. During your opponent's upkeep step, Seedborn Muse untaps all permanents you control.
2. Cast Time Stop.
3. With Time Stop on the stack, activate Isochron Scepeter, casting a copy of Narset's Reversal.
4. Copy Time Stop with Narset's Reversal, returning Time Stop to your hand and ending the turn.
5. Repeat on each opponent's turn.

What the combo produces

• Infinite turns
• Lock