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

Prerequisites

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

Steps

1. Activate Lithatog's first ability by sacrificing Mox Opal
2. Yomiji triggers, returning Mox Opal from your graveyard to your hand
3. Resolve the Lithatog 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
• Infinitely large Lithatog until end of turn
• Infinite storm count