Good card. But the funny thing is, the first thing I thought of was Excise, which does a better job conveying the flavor of "A Better Offer". I don't know what you want to do with that info, though...

yeah Excise does a good job too but it is limited to only attacking creatures whereas this can hit anything. Making this cost would make it far too powerful so I decided to go this way. I WAS going to make it "controller pay's that creature's casting cost" which would make it much nastier for the higher cost cards.

If they pay then the creature obviously rejected the trademage's offer, if they don't...well the consortium's pockets are VERY deep.

Mana cost vs converted mana cost doesn't make very much difference, as in most cases they'll have cast the creature by paying its mana cost anyway. So this could probably just say "pays its mana cost" like Pendrell Flux (Oracle wording).

A small typo that seems to have been overlooked? What DOES it's mama cost?