Hullbreaker Horror, and Mox Amber

Prerequisites

• Hullbreaker Horror on the battlefield
• Mox Amber on the battlefield

Steps

1. Activate Mox Amber by tapping it, adding
2. Cast the permanent by paying at most one colored mana
3. Hullbreaker Horror triggers, returning Sol Ring from the battlefield to your hand
4. Cast Mox Amber by paying Hullbreaker Horror triggers, returning the permanent cast in step 2 from the battlefield to your hand
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colored mana
• Infinite storm count