Arfus

Arfus is a spectral puppy featured in the Knights of the Frozen Throne expansion for Hearthstone. Like his master, the Lich King, Arfus' card effect adds a random death knight card to the player's hand.

His name is a pun on "Arthas" and "arf", an onomatopoeia for a dog's bark.

Trivia

 * In the Polish version of the game, Arfus' name is "Lick King".