Another Manifest card, this is a decent combat trick, although the mana cost is high. Not much to say about it finance or playability-wise; you will play this in limited and like it, it likely will not see contructed play. Is manifest a Temur ability? With cards being spoiled outside of Temur colors that still Manifest creatures, that would be a "no" which means we could see quite a few Manifest cards in the set, in all colors.
Could there be money to be made on Trail of Mystery? It certainly seems that way. I think the price will go up regardless of how good it actually is.