Slurpuff looked very innocent when we first saw it and a little bit underwhelming as it "just" gave an extra card each turn
Then each spell you cast with that named character in their name, flavor text, or art costs less to cast, but just the colored mana, not generic
Since Im in a teaching mood, Ill share my thought process for how Ill go about finding which decks this likely goes in
Big help from the manager Jerry
This Thunder/Pyro theme uses overcharged Level and Rank 4 Xyz Monsters to build an electrical loop monsters overlay into Xyz Monsters, then detach materials to add cards to a Duelists hand or destroy an opponents cards, then can recharge by attaching monsters from the Graveyard
So grateful to have a friend like you