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

Prerequisites

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

Steps

1. Activate Lithatog's first ability by sacrificing Mox Amber
2. Yomiji triggers, returning Mox Amber from your graveyard to your hand
3. Resolve the Lithatog ability, giving it +1/+1 until end of turn
4. Cast Mox Amber by paying
5. Activate Mox Amber by tapping it, adding one mana of any color among legendary creatures or planeswalkers you control
6. Repeat

Results

• Infinitely large Lithatog until end of turn
• Infinite mana among colors of legendary creatures and planeswalkers you control
• Infinite storm count