Time Warp + Call to Mind + Mystic Retrieval + Swarm Intelligence

Time Warp

Call to Mind

Mystic Retrieval

Swarm Intelligence

How it works

1. Cast Time Warp by paying 3, targeting yourself.
2. Swarm Intelligence triggers, copying Time Warp, targeting yourself.
3. Resolve both Time Warps, causing you to take two extra turns after this one.
4. Move to your next turn.
5. Cast etiher Mystic Retrieval or Call to Mind by paying its mana cost, targeting either Call to Mind or Mystic Retrieval in your graveyard.
6. Swarm Intelligence triggers, copying Call to Mind or Mystic Retrieval, targeting Time Warp.
7. Resolve both Call to Minds or Mystic Retrievals, returning Time Warp and either Call to Mind or Mystic Retrieval from your graveyard to your hand.
8. Move to your next turn.
9. Repeat.