Isochron Scepter, Orim's Chant, Seedborn Muse, and Teferi, Mage of Zhalfir

Prerequisites

• Isochron Scepter on the battlefield
• Orim's Chant in exile
• Seedborn Muse on the battlefield
• Teferi, Mage of Zhalfir on the battlefield

Steps

1. On each opponent upkeep activate Isochron Scepter to cast Orim's Chant targeting the player who's turn it is, preventing them from casting spells that turn
2. Seedborn Muse untaps both Isochron Scepter and the mana required to activate it each turn
3. Teferi, Mage of Zhalfir prevents your opponent from playing spells at instant speed before you are able to cast Orim's Chant or in response to Orim's Chant
4. You may also pay the kicker cost to prevent them from attacking

Results

• Opponents can't attack with creatures
• Opponents can't cast spells