Ashaya, Soul of the Wild, Darksteel Garrison, and Sculptor of Winter

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Darksteel Garrison on the battlefield
• Sculptor of Winter on the battlefield

Steps

1. Activate Sculptor of Winter by tapping it, targeting itself
2. Darksteel Garrison triggers, giving target creature +1/+1 until end of turn
3. Resolve the Sculptor of Winter ability, untapping it
4. Repeat

Results

• Infinitely large creatures until end of turn