Yennett, Cryptic Sovereign, Liliana Vess, Venser, the Sojourner, and Nexus of Fate

Prerequisites

• Yennett, Cryptic Sovereign on the battlefield
• Liliana Vess on the battlefield
• Venser, the Sojourner on the battlefield
• Nexus of Fate in the library
• Yennett does not have summoning sickness
• Liliana has at least three loyalty counters
• Opponents are unable to kill Yennett

Steps

1. Activate Liliana's second loyalty ability by removing two loyalty counters from it, searching your library for Nexus of Fate, shuffling your library and putting Nexus of Fate on top of your library
2. Activate Venser's first loyalty ability by putting two loyalty counters on it, exiling Liliana until your end step
3. Proceed to your combat phase, and declare Yennett as an attacker
4. Yennett triggers, revealing Nexus of Fate from the top of your library and causing you to cast it without paying its mana cost
5. Resolve Nexus of Fate, getting an extra turn after this one and shuffling it into your library
6. At the beginning of your end step, Liliana returns from exile to the battlefield
7. Repeat each turn

Results

• Infinite turns