Uhh. So it's like Cyclical Evolution, except it also... oh I see, it puts all DFCs (or DFC creatures, at least) to their back side during your turn, and then puts everything (every creature) back to its front side at the end step.

Has unfortunate (but not broken) interactions with things like Kytheon, Hero of Akros. I think the rules don't currently handle what it does to Startled Awake/Persistent Nightmare, but they easily could do (sorceries on the battlefield go to the graveyard, job done). Might be just as useful for hosing opposing big hard-to-transform creatures like Withengar Unbound and Awoken Horror as to transform your own hard-to-transform creatures.

Wait; isn't that castlevania? As in, not Zelda at all?

I guess we can make this a generic-old-vidja-games set.

There are no creatures with CMC zero, so the first transform instruction has a useless restriction. As for Alex's comment about Startled Awake, I'm pretty sure the rules are that it just ignores the instruction to transform.

@Dude: What's the converted mana cost of a transformed creature? Is it supposed to be the base creature's converted mana cost?

@Vitenka: Oh, crud, you're right. I was mis-remembering this event as coming from Zelda II, but it came from Castlevania II. That being the case, I'm pulling this submission, and I'll be changing it to something else later. But I'm keeping it intact for right now until this current conversation is officially concluded.

Also, after driving home, I realized this card has another bug: You can play Kytheon, Hero of Akros into it after it's flipped everything, get to end of turn, and watch it transform into Gideon Battle-Forged. Technically, it would eventually turn back... but not for another 3 turns.

Dude: Ornithopter. Crimson Kobolds Crookshank every single token...

Not that those can transform; but yeah; I'd just say "non-token".

@jmgariepy Well, no need to actually pull it. What event were you thinking of? Dark Link?

Sorry, no 0 mana double-faced creatures. As of Shadows over Innistrad, the CMC of the back is equal to the CMC of the front. (The back still has no mana cost, just to be extra confusing.)

You're safe with the flip-walkers, though, since the planeswalker side immediately dies for having 0 loyalty.

@Vitenka: No, it's cool. It's a flawed card anyway, and I don't think there's any way to 'make it work'. At least not the way I was thinking.

I just wasn't thinking it through. I thought the 'Horrible Night for Curse' event happened in Zelda II, as well as the town full of spirits. Seeing they're both popular fantasy side-scrollers, of the same generation, it's not hard to figure out where the mistake was made. Just seems obviously wrong once you remember that Castlevania II existed.

If the intent is to transform things for one turn only, would "transform all creatures until end of turn" work?

Alternatively, if the intent is to transform to back face and then back to front face, can it just say that? "Transform all creatures which are front face up. At the beginning of the end step, transform all creatures which are back face up"?

(Or you could even say "day face" and "night face" if you want to up the flavour at the expense of doing different things to DFC from different sets.)

You could move the design to Cards Without Home if you want to keep the discussion for future reference.

Good point! I'll...

Hey... where's the move button?

There it is :)

(The move operation has historically been restricted to need edit permission on the destination cardset, but admin permission, not just edit permission, on the source cardset. Where "admin" means "cardset owner or Alex". I can't remember why I made that need admin rights though; permission to edit ought to be enough.)