Regal Poltergeist

Haunt (When this creature dies, exile it haunting target creature.)
Whenever Regal Poltergeist or the creature it haunts attacks, target creature can't block this turn.
The Kraian invaders spared no mercy for the previous royalty of Valtana. The previous royalty of Valtana, in turn, spared no mercy for the Kraian invaders.