While this is powerful, especially in a format like Modern, where Turn 4 is so important (a lot of decks can kill on Turn 4 unimpeded, and Ad Nauseam doesn't play much interaction), the question will be whether this raw power is worth a bit less consistency
Normal Draft sets are around 250-300 cards, so a set thats almost seven times bigger is going to be a bit crazy to follow
Theres a deckbuilding challenge here, since you want to mix good activated abilities with ways to pump up Agatha, while also adding enough board presence to make Agathas own activated ability worthwhile
They are a member of the enigmatic Qu race and their favorite thing to eat is frogs
This makes all "tutors" extremely risky to cast, with this effect possessing the capability of shutting numerous lands that are sacrificed to find lands of that player's choice