Grinning Ignus, Heartless Summoning, and Agatha's Soul Cauldron

Prerequisites

• Grinning Ignus in hand
• Heartless Summoning on the battlefield
• Agatha's Soul Cauldron on the battlefield
• available

Steps

1. Cast Grinning Ignus by paying
2. Activate Grinning Ignus' ability by paying due to Agatha's Soul Cauldron and returning it from the battlefield to your hand, adding
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colored mana that can only be spent to activate abilities of creatures
• Infinite colorless mana
• Infinite storm count