Kaya the Inexorable, Karn's Temporal Sundering, and Doubling Season

Prerequisites

• Kaya the Inexorable in hand
• Karn's Temporal Sundering in hand or in exile or in the graveyard
• Doubling Season on the battlefield
• available

Steps

1. Cast Kaya the Inexorable by paying , causing her to enter with ten loyalty counters due to Doubling Season
2. Activate Kaya's last ability by removing seven loyalty counters, getting her emblem
3. At the beginning of your next upkeep, the emblem triggers, allowing you to cast Karn's Temporal Sundering from hand, graveyard, or exile without paying its mana cost, gaining an extra turn after this one
4. Repeat step 3 each turn

Results

• Infinite turns
• Lock