I think this is a reasonable card. You need to get two of them in play before your opponent will even care in the slightest. Three will give -some- decks problems, more so if you use the aether mark, obviously, as 8 is a huge difference in gameplay from 10. It's a good situational card, but I hardly think it's overpowered. The only thing I don't like is the ugly odd number division :p 75-37-18-10 - 8, assuming round down. Setting the cap to 72 or 80 would prevent my brain from imploding if this card is implemented :p