For small amounts of milling, its more efficient than Bruvac the Grandiloquent, and its excellent with some Persistent Petitioners
Celes was considered for 6 since the deck is focused around the World of Ruin and the second half of that game, while Yuna was considered for 10 as a fan-favorite
While you cant use them in the Pokmon Trading Card Game, these early Topps cards have become very valuable
Managorger Hydra naturally grows since it counts the spells from all your opponents, so you dont need to go deep on spell casting and cantrips
Lastly, there's one card, bear druid Doc Aurlock, Grizzled Genius, that reduces plotting costs
Just leave a mana up for a sneaky counterspell like Mana Tithe, because you never know