I too had this issue in my sealed event which cost a loss. I had mana available, the cards exiled had not been cast using this ability before, and I was never given the option to cast the spells. After reading the comments it does appear to be visual because the interface was prompting strangely.
I too had this issue in my sealed event which cost a loss. I had mana available, the cards exiled had not been cast using this ability before, and I was never given the option to cast the spells. After reading the comments it does appear to be visual because the interface was prompting strangely.