Ghosts! Get them put them in the front row, speed them at the enemy-> more ghosts! If they try to fly away then hit replay do the same again and this time they won't run away -> GIANT ARMY Q.E.D.
Great game! Only suggestion is that when you (or the opponent) has lots of cards on the table it zooms out massively - Maybe spread them onto two lines at some point?
 "Flash's Bounty"){kind=icon}
 "Dangerous adventure"){kind=icon}
 "War of Omens"){kind=icon}