While Cinderella works especially well in decks that focus more heavily on princess characters, she also does let you trigger her effect by just playing her, making her a solid draw/ink engine in-and-of-herself
EX6-041 U Digimon Lv [Main] By paying 2 cost and placing this card as 1 of your [Legend-Arms] trait or 1 of your level 5 Digimon's bottom digivolution card, until the end of your opponent's turn, 1 of their Digimon gains "[Start of Your Main Phase] This Digimon attacks." [Your Turn] [Once Per Turn] When an effect adds to this Digimon's digivolution cards, it gains Blocker and Reboot until the end of your opponent's turn
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New Ability Word: Celebration The Phyrexians have been defeated, and that's cause for merriment
Vibrava #1002 (Pokemon Chinese Gem Pack 5 | Pokemon Cards) prices are based on the historic sales
The only known cards for this type of rarity are apparently misprinted versions of the two original Secret Rares: "Gaia the Dragon Champion" and "Tri-Horned Dragon" from the original Legend of Blue Eyes White Dragon booster pack, with the "Tri-Horned Dragon" being the much rarer card