That's what I figured they intended, and why I think they should have replaced "Can't" with "Don't". Can't is ambiguous as to whether or not the event happens at all or whether the card just doesn't flip, while Don't would have specifically denied the event and its consequences. Either that or have the ability specifically refer to the other side of the card, such as, "If a player casts two more spells this turn, transform Ravager of the Fells into Huntsmaster of the Fells at the next upkeep." Its wordy and ridiculously redundant, but probably would have been been clearer on his type of ability.