Xanir, the Dreamthief

Ward—Exile a spell you control.
As long as it's an opponent's turn, spells you cast
cost {1} less to cast.
At the beginning of each end step, each
opponent who cast a spell that didn't resolve this
turn loses 2 life. If one or more players lose life
this way, surveil 2.
"Nightmare spiced blood is a true delight."