Soul Reaper

Soul Reaper  is a basic  Death Knight  spell card.

How to Get
Soul Reaper x 2 are given as a reward for raising a Death Knight to Level 4.

Golden Soul Reaper is a reward for raising a Death Knight to a high level.

Soul Reaper is soulbound and cannot be crafted or disenchanted.

Strategy
Soul Reaper has decent value even if it's not played against a weakened opponent. If it is, it's one of the highest-value cards in the game. With half the price of Fireball and 33% added damage, casting two Soul Reapers when your opponent is at 15 health is sufficient to kill them.

An excellent card for any Death Knight.

Lore
Soul Reaper, in World of Warcraft, is a Death Knight spell that deals moderate damage to an enemy, then after a brief delay much higher damage if they are at low health. It's a powerful finisher attack, much like the Warrior's Execute.