You have three or more other cards in your graveyard.
Steps
Activate
Black Lotus by tapping and sacrificing it, adding ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Cast
Brain Freeze from your graveyard for its escape cost by paying ({1} magic symbol) ({U} magic symbol) and exiling three other cards from your graveyard, ensuring not to exile
Black Lotus. Choose to have
Brain Freeze target yourself.
Brain Freeze's storm ability triggers, copying it for each spell you've cast before it this turn. Choose to have the first copy target yourself, and all other copies can target any player you desire.
Resolve all
Brain Freeze copies, causing you to mill three cards and then the other targeted players to mill cards.
Resolve the original
Brain Freeze, causing you to mill three cards.
Cast
Black Lotus from your graveyard for its escape cost by paying ({0} magic symbol) and exiling three other cards from your graveyard, ensuring not to exile
Brain Freeze.
Repeat.
Results
Infinite artifact ETB.
Infinite artifact LTB.
Infinite artifact sacrifice triggers.
Infinite self-mill.
Near-infinite colored mana.
Near-infinite magecraft triggers.
Near-infinite mill.
Near-infinite storm count.
Metadata
In 0 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Not Legal (Bracket N/A).