Nightveil Specterblade

Ninjutsu {3}{u}{b}
Blade of the Void — Whenever Nightveil Specterblade deals combat damage to a player, you
may exile a nonland card from their graveyard. If
you do, you may cast it without paying its mana cost this turn.
Moonlit Step — Whenever a creature you control leaves the battlefield, Nightveil Specterblade gains hexproof until end of turn.
"A blade unseen is deadlier than a thousand warriors in the light."