It is, yes. [ SHE'S JUST SETTLED FOR THIS NICKNAME... it could be worse. ]

... Er, to both questions. But the element used in an arte depends on the Seraph in question. Mikleo is a Water Seraph, so he'd be able to do something along the lines of that ice, while Edna is Earth, so something more like stalagmites. Most of my elemental artes were sealed, however.