Thoughts on Creating Specific New Cards

Mulldrifter:

-Start by creating the 2/2 flying creature for 4U. -Add the cost reduction code (like affinity) to reduce its cost by 2. -Add a comes into play ability. Part 1: draw 2 cards. -Comes into play part 2: If 2 mana is available, show a dialog. (use code similar to Mox Diamond for this part) -The dialog should have the options 'Pay 2' and 'Sacrifice this'. -Like Mox Diamond, if 'sacrifice' was chosen, or the dialog was not shown, bury the card. Otherwise charge 2 mana. -Voila, you have Mulldrifter with the appropriate mana cost! The same can be done for Shiekmaw, but not Cloudthresher, unless there is a way to reduce colored costs too.