[Graeme Dice]

Originally posted by Arryn:
The spell Body Ethereal has an AoE of 1. The Wyrm is size 6, and thus larger than 1 standard square (or at least it looks that way on the pre-battle positioning map). Can a Seithkona still cast BE on the Wyrm, since the target takes up more squares than the BE's AoE of 1?

Behemoths can be etherealized, so you probably can.

Bonus question: how many size 2 beings fit within 1 standard square?

Three. 6 sizes can fit in any given square, so you can put six hoburgs, or one Jotun and two hoburgs, and so on.