Shadowverse

Runecraft is a bit of a tricky thing... Well, yes, you can easily defeat various Flame Destroyers with something like Dance of Death, but firstly, you still haven't spent much mana to bring it into play. Secondly, you also have a card that destroys followers, which is almost free and buffed. Thirdly, nothing prevents you from bringing in another Flame Destroyer or some other nasty creature. )
I keep having problems trying to beat Runecraft, even when playing against the AI. I tried to win against it in training mode, playing as Sylvan and built a good deck with cards that buff each other... But I just can't seem to do it. It's a tough class.