GSE Gold Secret Dark Advance X TRAP During either player's Main Phase or Battle Phase: Target 1 monster in your Graveyard with 2400 or more ATK and 1000 DEF
The only time the characteristics of the back face really matter is when the permanent is on the battlefield with its back face up
How to Play : Use Flare Strike as a strong opening hit, then switch Cinderace out to reset the cooldown
IIRC in Yugioh there is only a certain number of Blue-Eyes (from the show?), so you could put a rule on the card 'there may only be X Blue-Eyes on the battlefield at any time', Star Wars CCG used to have permanents that you could have 2 or 3 copies of in play, in addition to stuff you could only have 1 of, the concept would work fine here too, only this could care about both players' boards
place it on the top of the Deck
Wizards could have gone a few different directions with the reskin, including using an actual Octopus legend like Marvo, Deep Operative