Sorcery of the red-robed Yulva,
one of the Sealers of New Londo.
Reduce bleeding and poison build-up,
and undo various poisonous effects.
One of the New Londo's unique healing sorceries.
Perhaps she abandoned her Sealer duty to
take her healing arts back to Blighttown.
It is found in a chest in Blighttown near the elevator. The quickest way to get there is the shortcut from the Valley of Drakes. Descend several ladders and watch out for a path on a root with some woods. Follow that root slowly (or you'll easily fall to death) to the other side, kill the Cragspider and you'll see a body with the Crimson Armor Set and directly aside the treasure chest with this spell.
It reduce bleeding and poison build-up, and undo various poisonous effects.