Vayne, the Night Hunter

Night Hunter (Vayne, the Night Hunter
has haste if an opponent controls a black
creature.)
Silver Bolts (If Vayne, the Night Hunter is
blocked by a creature controlled by an
opponent,Vayne, the Night Hunter deals
an extra 4 damage to blocking creature.)
Final Hour, {w}{w}{w}: Vayne, the Night Hunter
becomes untargetable until the end of the turn.
(You may cast this anytime as if it were an instant.)