Arfus

Arfus is a spectral puppy originally 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.

There are two variations of Arfus, one from retail servers and one from.

• On retail realms, Arfus has a chance to drop from the Loot-Filled Pumpkin during the Hallow's End event. Obtaining it will reward The Lick King feat of strength.
• In Wrath of the Lich King Classic, Arfus is a reward from the Defense Protocol Gamma: Terminated achievement.

• His name is a pun on "Arthas" and "arf", an onomatopoeia for a dog's bark.
• In the Polish version of the game, Arfus' name is "Lick King".

HS Arfus (On the Hearthstone Wiki)