Golemagg the Incinerator

Sulfuron Harbinger has +5 ATK while attacking and can attack only heroes. At the end of your turn, Golemagg deals 3 fire damage to target opposing hero or ally. At the start of your turn, if Golemagg has 15 or more damage, flip him. Sulfuron Harbinger has +5 ATK while attacking and can attack only heroes. When Golemagg is dealt damage, he deals 5 melee damage to the source of that damage.