Karador, Ghost Chieftain, Slick Imitator, Narset's Reversal, and Time Warp

Prerequisites

• Karador, Ghost Chieftain on the battlefield
• Slick Imitator on the battlefield
• Narset's Reversal in hand
• Time Warp in hand
• You have max speed
• plus enough mana to cast the extra turn spell each turn available

Steps

1. Cast Time Warp by paying its mana cost
2. Holding priority, cast Narset's Reversal by paying , targeting Time Warp
3. Holding priority, activate Slick Imitator by paying and sacrificing it, copying Narset's Reversal, with the copy targeting the original Narset's Reversal
4. Resolve the copy of Narset's Reversal, copying the original Narset's Reversal targeting Time Warp, and returning the original Narset's Reversal to your hand
5. Resolve Time Warp, causing you to take an extra turn after this one
6. Cast Slick Imitator from your graveyard by paying
7. Repeat each turn

Results

• Infinite turns