User blog comment:Miskos3/Fairy Tail Episode 245: Tartaros arc: Hell's Core, Review/@comment-4999650-20150808150245/@comment-31.132.65.53-20150808175118

It can't be Keyes necromancy, because Azuma didn't die. He is still alive as the trees on Tenrou.

My guess is that they are the product of Rusty Arc of Embodiment. Only that creating life with magic sounds too friggin OP.

Actually this is kinda sad. Rusty new look may look cool, but for me he looks more like a hobo now. And he has imaginary friends. Poor him :D