Bonefire, Searing Summoned Skeletal Beast,
is a Unique Skeletal Charger
found in the Alley of Embers
in Act V
of Diablo III
In combat, he has Molten and Extra Health affixes. In addition, there is a guaranteed Rare Ghastly Seraph with his minions nearby, and most likely players will have to fight them both at a time.