Brain Freeze, Lotus Petal, Mizzix of the Izmagnus, and Underworld Breach

Prerequisites

• Brain Freeze in hand
• Lotus Petal on the battlefield
• Mizzix of the Izmagnus on the battlefield
• Underworld Breach on the battlefield
• You have at least one experience counter
• You have a storm count of at least one

Steps

1. Activate Lotus Petal by sacrificing it, adding
2. Cast Brain Freeze by paying , targeting yourself
3. If you have less than two experience counters, Mizzix triggers, causing you to get an experience counter
4. Brain Freeze's storm ability triggers, creating a copy of Brain Freeze for each other spell you've cast this turn, with one copy targeting yourself and all remaining copies targeting any player
5. Resolve all Brain Freeze spells, causing yourself to mill six cards and all other targeted players to mill three cards for each Brain Freeze
6. Cast Lotus Petal from your graveyard for its escape cost by paying and exiling three cards from your graveyard
7. Activate Lotus Petal by sacrificing it, adding
8. Cast Brain Freeze from your graveyard for its escape cost by paying and exiling three cards from your graveyard, targeting yourself
9. Repeat from step 4

Results

• Infinite self-mill
• Near-infinite magecraft triggers
• Near-infinite mill
• Near-infinite storm count