Karador, Ghost Chieftain + Slick Imitator + Narset's Reversal + Karn's Temporal Sundering

Karador, Ghost Chieftain

Slick Imitator

Narset's Reversal

Karn's Temporal Sundering

How it works

1. Cast Karn's Temporal Sundering by paying its mana cost.
2. Holding priority, cast Narset's Reversal by paying , targeting Karn's Temporal Sundering.
3. Holding priority, activate Slick Imitator by paying 1 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 Karn's Temporal Sundering, and returning the original Narset's Reversal to your hand.
5. Resolve Karn's Temporal Sundering, causing you to take an extra turn after this one.
6. Cast Slick Imitator from your graveyard by paying 1.
7. Repeat each turn.