Sidisi, Undead Vizier + Nexus of Fate + Chainer, Nightmare Adept

Sidisi, Undead Vizier

Nexus of Fate

Chainer, Nightmare Adept

How it works

1. Activate Chainer by discarding a card, allowing you to cast a creature spell from your graveyard this turn.
2. Cast Sidisi from your graveyard by paying 3.
3. When Sidisi enters the battlefield, its exploit ability and Chainer trigger.
4. Resolve the Chainer trigger, giving Sidisi haste until end of turn.
5. Resolve the Sidisi trigger, causing you to sacrifice Sidisi.
6. Sidisi's second ability triggers, causing you to search your library for Nexus of Fate and put it into your hand.
7. Cast Nexus of Fate by paying 5, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
8. Repeat each turn.