Feel free to edit your post and add in actual damage being dealt, rather than simple burns to his robes. Since he didn't dodge, I do think the burns would materialize on his chest.

Also, now on to another ability of his that confuses me. Although I'm not against it as much as its process eludes me so far. Corban and Ishtalle fused together? What parts of both characters are present in the one new body? As in, each organ roughly, (I assume the skin is veiled by Ishtalle's durability, but coating Corban's?)

I've been working on Myron's extended rune sheet, I'll have the information available to you before my next post.