Peer into the Abyss by paying ({4} magic symbol) ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) , causing an opponent to draw cards equal to half their library size and lose half their life total, rounded up.
Sheoldred's second ability triggers for each card drawn this way.
Resolve the first
Sheoldred trigger, causing the opponent to lose 2 life.
Repeat step 3 until the opponent loses the game due to having zero or less life.
Results
Near-infinite card draw for target opponent.
Near-infinite draw triggers for target opponent.
Near-infinite lifeloss for target opponent.
Target opponent loses the game.
Metadata
In 44659 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Oddball (Bracket 2-3+).