By mimicking MTG's mechanics, this card game will likely cannibalize sales from the former. WOTC isn't going to let that happen. If anything, they'd want simpler mechanics for this game in order to attract the younger crowd (not that that's necessarily a bad thing), making it more accessible from a gameplay standpoint. In any case, you already see differences from Magic in that the character cards have defense and heart values, implying that damage suffered can be permanent. Maybe a win condition would be to eliminate all of your opponent's characters. Personally, I hope this succeeds; but because this is also a CCG, in order to enjoy any sort of longevity it will have to develop a healthy secondary market much like Magic (rarity and demand for limited quantities of cards determining the card price).