Cassial, after her update, will now act like a Martyr Golem and redirect damage to herself. So I had to ask myself what happened if you had both of them out at the same time.
Well, as it happens, Martyr Golem will take the damage and Cassial will be an Ascended flying character. It works something like this, but I'm gonna warn that it gets dicey:
A character takes damage. Either A) Cassial redirects this damage to herself or B) Martyr Golem will redirect the damage to itself. In the case of A), Cassial will ascend and gain flying. Then Martyr Golem will redirect the damage from Cassial to itself. Because Cassial is Ascended, she won't redirect the damage again. In the case of B), Cassial redirects the damage to herself and ascends, then it goes back to the Martyr Golem and stops there.
This works regardless of which character you deploy first.
Remember kids, the more you know, the better you can figure out those weird card interactions.
Surprisingly, this interaction completely followed the logic I used to think about it before actually testing it out. Which is pretty sweet.