Floodmaw on Cecil and Dion effectively exiling them
I was playing Orzhov Knights with Cecil and Dion against a prowess deck. In game 1, they hit my Cecil with a floodmaw, but rather than returning to my hand, he stayed on the board but appeared to not exist anymore as I could cast a second Cecil without the legend rule triggering and he couldn't block or attack. The same thing happened to a Dion in game 2. I suspect it has something to do with transform creatures being bounced. The picture below shows the Dion after he got hit by a floodmaw, and despite still being on the board visually and not in my hand, he can't block. He also couldn't be recast since he never returned to hand.
-
Your God Mibby#32918
commented
Addendum, this might just be applying to everything because the token depicted here got bounced and also is effectively exiled.