Necrobolt

As an additional cost to cast Necrobolt, put the top two cards of your library into your graveyard.
Destroy target creature with power less than the number of creatures in your graveyard.
"Ithrax was founded on death and disease. If I need to break every foundation of his reign to bring Aldavin to his rightful end, I will stop at nothing to do so."
-Reyhardt, Stalwart Templar.