For the record, I was the second person, as playtesting with the new Trainer feature revealed a huge problem with Jezebel consistently targeting her own Water Pillars even when her Quantum Pillars were greater in number AND slotted first. She ate her own
quanta up creating a swarm of lethal 1/4 attackers, and then didn't have any left to create anything else!
Changing the Mark to Water and swapping out the Water Towers/Pends for Pests, however, made her work perfectly -- not too strong (probably actually in the bottom 50% for sheer power), but always mysterious and always actually threatening. There's really not much like seeing Nymph's Tears, thinking 'ah, it's probably another Death Nymph or whatever', and then suddenly watching all of your quanta disappearing down a Black Hole. 8)
I strongly encourage Wizardcat and TNG to playtest Hecate and Serket using the new system as well -- literally, not doing it is just potentially wasting Zanz' time, as (if they don't work right) he'll have to modify the decks himself once they're in-game. Isn't it better all around if the deck's creators do that part for him?