Ever since Celestia, I've wished that I could mutate more of my spells. The Celestia mutate spell for an ice wizard is to turn an ice wyvern into a fire wyvern. I wish there was a mutate school or mutate cards so that I could mutate more of my spells like that, maybe even mutate a spell into an entirely different attacking creature. Maybe even a wild card mutate so that you wouldn't even be sure what was going to happen when you cast it. That could be kind of exciting.
