Ashaya, Soul of the Wild + Caged Sun + Karn, Silver Golem

Ashaya, Soul of the Wild

Caged Sun

Karn, Silver Golem

How it works

1. Activate Karn by paying 1, 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 2.
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.