Echocasting Symposium + Capture of Jingzhou + Possessed Skaab

Echocasting Symposium

Capture of Jingzhou

Possessed Skaab

How it works

1. Cast Capture of Jingzhou by paying its mana cost, causing you to take an extra turn after this one.
2. Move to your next turn. At the beginning of your precombat main phase, Echocasting Symposium's paradigm ability triggers, causing you to cast a copy of it from exile.
3. Resolve the copy, creating a token copy of Possessed Skaab
4. When the Possessed Skaab token enters, it triggers, returning Capture of Jingzhou from your graveyard to your hand.
5. Repeat.