Seeker of Skybreak, and Wake Thrasher

Prerequisites

• Seeker of Skybreak on the battlefield
• Wake Thrasher on the battlefield
• Seeker of Skybreak does not have summoning sickness

Steps

1. Activate Seeker of Skybreak by tapping it, untapping itself
2. Wake Thrasher triggers, giving itself +1/+1 until end of turn
3. Repeat

Results

• Infinitely large Wake Thrasher until end of turn