Angel's Grace by paying ({W} magic symbol) , preventing you from losing the game this turn.
Cast
Ad Nauseam by paying ({3} magic symbol) ({B} magic symbol) ({B} magic symbol) , putting your entire library into your hand and losing life equal to each card's mana value.
Activate
Cadaverous Bloom by exiling a card from your hand, adding ({B} magic symbol) ({B} magic symbol) .
Activate
Pestilence twice by paying ({B} magic symbol) ({B} magic symbol) , dealing 2 damage to each creature and each player.
Your life total is instead set to one due to
Angel's Grace.
Repeat from step 3.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite black mana.
Near-infinite damage.
Near-infinite green mana.
Metadata
In 1 deck according to EDHREC.
Bracket Tag
This combo has been estimated to be Powerful (Bracket 3+).