if you remember the "flip" cards of kami...these new double faced cards are just rip offs of that ability, designed to boost sales in WOTC sanctioned card sleeves, and extra "checklist" cards which im sure they will start selling on thier site, overall i agree 100%, they dropped the ball with this, if could have been so much more, but is nothing more then a rehashed "flip" thats been geared toward product sales
If a triggered ability asks you to pay a cost (such as that of Mirrorworks), you pay that cost for the copy separately
X-spells synergize with mana production capabilities, and between production fromGlaring Fleshraker and Eldrazi Spawn tokens, you can fire off a very powerful spell
Players can sacrifice them
Coven Counters is headed up by Leinore, Autumn Sovereign, whos a four mana Green and White 0/4