Ashaya, Soul of the Wild, Caged Sun, and Karn, the Great Creator

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Caged Sun on the battlefield
• Karn, the Great Creator on the battlefield
• "Green" chosen with Caged Sun
• Caged Sun does not have summoning sickness

Steps

1. Activate Karn's first loyalty ability by putting a loyalty counter on it, causing Caged Sun to become an artifact creature until end of turn
2. Activate Caged Sun by tapping it, adding
3. Caged Sun triggers, adding
4. Repeat step 3
5. As Caged Sun's triggered ability is a mana ability, this combo creates a mandatory infinite loop that cannot be interacted with, thus ending the game in a draw

Results

• Draw the game