i don't think this card would see any play if it were more then 1 mana. ritual of doom wouldn't see play as a stand alone card. void terror doesn't even see play. though it would be a neat play or turn 8 or 9 to play 4 or 5 ritualists and then turn them into a single 4/12 or 5/15 minion. thats a big threat with a lot of trading power.