Forgotten Creations ability to create a Drake for each card in your hand seems slow, as you have to wait a turn, while Olivia, Mobilized for Wars ability to chain Drakes off discard triggers from the last Drake feels like a bit of a win-more, as you still need something initializing it
Additionally, Greninja Ex is not impenetrable
"Maxie's Hidden Ball Trick," which allowed players to instantly play a Fighting-Type Pokmon if there were no other cards in that player's hand, was causing issues with "Archeops" cards
This is most obvious with "Card of Sanctity", which has all players draw until they have six cards in their hands, as usually when it's used the character had one, two, or no cards left
Lots of fun, but requires a little more attention
However, most larger formats have a multitude of cost-reduced spells, such as the engine offsetting the cost of Pitch spells, letting a Beanstalk player accelerate through their deck without losing on the tempo axis