The Master, Multiplied + Kiki-Jiki, Mirror Breaker + Izzet Chemister + Time Walk

The Master, Multiplied

Kiki-Jiki, Mirror Breaker

Izzet Chemister

Time Walk

How it works

1. Cast Time Walk by paying 1, causing you to take an extra turn after this one.
2. Activate Kiki-Jiki by tapping it, creating a token copy of Izzet Chemister.
3. Activate the Izzet Chemister token's first ability by paying and tapping it, exiling Time Walk from your graveyard.
4. At the beginning of your end step, Kiki-Jiki triggers, but you cannot sacrifice the Izzet Chemister token due to The Master.
5. On your next turn, activate the Izzet Chemister token's last ability by paying 1, tapping it, and sacrificing it, casting the exiled spell without paying its mana cost.
6. Resolve that spell, causing you to take an extra turn after this one.
7. Repeat from step 2.

This clever loop locks down infinite turns in Vintage by cleverly bypassing the traditional restrictions of temporary token creation. While Kiki-Jiki, Mirror Breaker normally forces you to sacrifice its copies at the end of the turn, The Master, Multiplied uses its static ability to completely shut down any triggered ability that would force you to sacrifice or exile your creature tokens. This protection allows you to keep an engineered token copy of Izzet Chemister indefinitely, using its first ability to tuck away Time Walk from your graveyard. On your subsequent extra turns, you simply activate the Izzet Chemister token's final ability to cast Time Walk for free, chaining extra turns while safely preserving your engine turn after turn.