Personally, I wished it acted like a Skill Drain for all face-up card your opponent controls while you control it for that Godly factor
Fairy Tale Cinderella Type: Spellcaster/Effect Level: 4 Attribute: LIGHT/ ATK: 1800 DEF: 1500 Effect: When this card declares an attack: It gains 200 ATK until the end of the Battle Phase
Your opponents will have to opt between not drawing, not attacking, or not casting spells in their main phase but not you, obviously

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You can also sacrifice clue tokens to other effects, potentially reducing the amount of mana it costs to transform this card
For those who just like to rip open a booster and have no desire to play limited formats, these are the ones to pick