Emet-Selch, Unsundered // Hades, Sorcerer of Eld, Capture of Jingzhou, and Haystack

Prerequisites

• Emet-Selch, Unsundered // Hades, Sorcerer of Eld on the battlefield
• Capture of Jingzhou in the graveyard
• Haystack on the battlefield
• plus enough mana to cast the extra turn spell each turn available

Steps

1. Cast Capture of Jingzhou from your graveyard by paying its mana cost
2. Holding priority, activate Haystack by paying and tapping it, phasing out Hades
3. Resolve Capture of Jingzhou, causing you to take an extra turn after this one
4. During your extra turn, Hades phases in during your untap step
5. Repeat

Results

• Infinite turns