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.
If Liliana has less than three loyalty counters remaining, activate Aminatou's second loyalty ability by removing a loyalty counter from it, blinking Liliana.
Otherwise, activate Aminatou's first loyalty ability by putting a loyalty counter on it, drawing Nexus of Fate and putting it back on top of your library.
Proceed to your combat phase, and declare Yennett as an attacker.
Yennett triggers, revealing Nexus of Fate from the top of your library and causing you to cast it without paying its mana cost.
Resolve Nexus of Fate, getting an extra turn after this one and shuffling it into your library.
Repeat each turn.

Infinite turns

Lock

Yennett, Cryptic Sovereign

Liliana Vess

Aminatou, the Fateshifter

Nexus of Fate

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

Venser, the Sojourner

Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Nexus of Fate and four other cards, then exiling the rest of your library and graveyard, putting the aforementioned cards on top of your library with Nexus of Fate being the bottom card, and causing you to lose half your life total, rounded up.
Activate Necropotence four times by paying 4 life, exiling the top four cards of your library.
Declare Yennett as attacker.
Yennett triggers, casting Nexus of Fate from your library without paying its mana cost.
Resolve Nexus of Fate, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat from step 3 each turn.

Combos with "Yennett, Cryptic Sovereign"