yes, even if there is a chance of failing it still would be OP to drag a dragon over to your side for such little cost, even if it fails one turn and works the second, that's a dragon for 6
. even some non-free-willed creatures can have decent costs associated with playing them. parallel universe is just a copy and not even removing the other card from play and it is 6
per. this card's ability is a parallel universe combined with an instant-death for the other players creature. the cost of the ability should have some reflection on that. if the ability were to simply cost more
to use as a base, a SoR would switch it back to OP in a jiffy. this is why i suggested the variable cost model which would:
1) put a limitation on when you can use the ability (need cost of ability + cost of target card if successful)
2) add in the cost of playing the target card (instead of it being 3
to kill any creature and getting a free creature out of it)
3) prevent using the ability on 4 dragons in a row to net you +4 dragons, your opponent -4 dragons, in 4 turns for only 12
(assuming success, could have also said rev'd up steam machines or shriekers to avoid the 'free-willed' defense)