Extravagant Replication + Time Warp + Damage Control Crew

Extravagant Replication

Time Warp

Damage Control Crew

How it works

1. Cast Time Warp by paying its mana cost, causing you to take an extra turn after this one.
2. Move to your next turn.
3. At the beginning of your upkeep, Extravagant Replication triggers, creating a token copy of Damage Control Crew.
4. When the Damage Control Crew token enters the battlefield, it triggers, returning Time Warp from your graveyard to your hand.
5. Repeat.

This elegant loop centers on the upkeep trigger of Extravagant Replication to continuously clone Damage Control Crew, using the token's entry trigger to fish Time Warp right back out of your graveyard. Because Damage Control Crew's Repair mode lets you grab any card with a mana value of 4 or greater, it effortlessly recycles the very extra-turn spell that keeps buying you more upkeeps. Once this engine gets rolling, you are essentially guaranteed to take every single turn for the rest of the game, locking out your opponents entirely.