For Challenge # 049.

Similar space to Bazaar trader, but I think sufficiently different. I wanted specifically the feel of a salesman, not just a generic merchant, hence the possibility to have to race to buy it, or have it sitting there to see who can get to the requisite cost first.

The active player thing may be a problem, but it simplified the wording so much I hope it's ok on a rare. I think I have the rules correct?

It also means it's riskier using this in your opponent's turn: they may be able to cast an instant spell first.

I believe the wording works, although it should probably spell out "cast as long as its exiled" and "when you could normally cast it"

I think you need "As long as it's exiled", as otherwise this is a "you have permission to play it right now, and never again" card, which makes it very different and much more confusing.

My first thought was that the card was broken... but, honestly, it's not much worse than Elkin Bottle. I think Elkin Bottle infers this card should probably have a small mana activation. If I'm to follow the money: Elkin Bottle was used in tournament decks back in the day, and so wasn't Jayemdae Tome - Jayemdae Tome isn't as powerful anymore, but good enough to reprint as an uncommon, so, probably is Elkin Bottle.

This does do a very scary dance around casting cost snags. My first thought would be to add as many cards out there. And add Urza's Quality Control. ;)

Chris is right, this needs "As long as it's exiled", otherwise it's a "right now or never". Which is actually a fine alternative way for it to be.

Really fun and interesting idea.