Varaxunax got those float-stones (conventional sorcery, those, not demon-magic) from Carthi Hool on page 35 of the previous issue. (It looks like only the x-shaped one kept working after Dosh knocked him out of the air; the rest turned gray.)
I bet Anthem says “obviously†in the most annoying possible way.
I imagine it’s common sorcerer survival knowledge how long your unshielded mortal body can persist in hell before roasting. Like how fishermen know how long it would take to freeze to death in the North Atlantic.
I was worried about Varaxxunas but I see that he’s alright, just boiling in Hell… no big deal for a demonologist, I guess. 😀
And now Emma watson is my headcanon Anthem. Make of that what you will