by pmsupport » Thu Apr 03, 2014 8:08 pm
Hi Mirandasmom, players who encounter the boss, kill it, or deal the most damage will receive 2 cards instead of one. Other damage dealers only get one bonus card. There is one exception: if you enter the battle before the boss escape but kill it after it escape, you will only get one card, which I believe it's exactly your case.
Enjoy the game!
Playmage Support