Yomiji, Who Bars the Way, Mox Opal, and Sarcatog

Prerequisites

• Yomiji, Who Bars the Way on the battlefield
• Mox Opal on the battlefield
• Sarcatog on the battlefield

Steps

1. Activate Sarcatog's second abilty by sacrificing Mox Opal
2. Yomiji triggers, returning Mox Opal from your graveyard to your hand
3. Resolve the Sarcatog ability, giving it +1/+1 until end of turn
4. Cast Mox Opal by paying
5. Repeat
6. If you control at least one additional artifact, you may also activate Mox Opal once per loop, resulting in infinite colored mana

Results

• Infinite colored mana
• Infinite storm count
• Infinitely large Sarcatog until end of turn