Karlov's Crossbow 5
Artifact — Equipment
Whenever equipped creature attacks, sacrifice Karlov s Crossbow and destroy target creature an opponent controls.

Equip 1

Forecast 0, Reveal Karlov s Crossbow from your hand: For the remainder of the game, spells you cast named Karlov s Crossbow cost 1 less to cast. (Activate only during your upkeep and only once each turn.)