For Challenge # 069 and inspired by Jack's entry. This is where I thought Jack's challenge was going, and got a little sad that he came up with a different, legitimately good design. I figured this card had a fair amount of value, though, offering to double your spells, but only locking one spell at a time onto it. Not spelled out on the card: The exiled card would then go to the graveyard after its second casting. You can't cast Cancel, then cast Cancel, then toss out a quick Peek to flip and cast Cancel again. I wonder how many people would get that right...

Added "you cast" to prevent milling shenanigans. I saw it, I just didn't think I could solve the problem with only two words... but I could, and it used less text in the process. An annoying side effect - your opponent can't stop this card from operating on any given turn by casting Liquify. Also, a timely Cremate can trap this Journeyman in the Mirror World. Oh well. I suppose the card was powerful enough. Having a glass jaw to punch isn't so terrible.

Why not "Whenever the first instant you cast this turn resolves?"

When you use the flip ability to cast a spell (assuming it started the turn flipped), and it unflips, won't it then immediately flip again when that spell resolves?

Yes it will. Crud. I'm having a hard time creating a workaround.

One thing I will mention is comp rules:

709.4. Flipping a permanent is a one-way process. Once a permanent is flipped, it’s impossible for it to become unflipped. However, if a flipped permanent leaves play, it retains no memory of its status. See rule 110.6.

I assume we're in a world where this has been rewritten to be more like DFCs however :)

I like the idea, but as is, it seems like it would work at least as well as a non-flip card saying something like "When an instant spell resolves, if there are no other cards exiled by ~, exile it. // You may cast cards exiled by ~."

A more flip-card-y approach might be to accumulate several exiled spells, and once it flips, you can cast those, but no more. Or if it's allowed to flip back and forth, perhaps let you cast the spell multiple times, but flip back when the opponent does something?

Took people's comments as a sort of layered advice. The card now waits for three spells to exile, flips, casts all three spells, then returns to your hand, so we don't have to worry about Alex's conundrum or rule 110.6 (which I think is a pretty silly rule, but this isn't the card to take a stand on it).

All in all, it's probably a stronger card. The font size is small, though. I don't know if it would see print... I don't know what the cut-off point for font on flip cards would normally be. Probably not.

Funny thing is that this could just be expressed as a level up creature. "When you cast an instant, exile it and put a level counter on ~..."

Now that I think of it, why am I bothering to return this to your hand? Three spells should be good enough. It isn't the card I first designed, but it's a good different card like this.