Here's what you do: Beat Darksol and then beat the Skull Warriors then have 1 character on each tile where the skulls appear. Then Have Max as far away as possible from Dark Dragon. Just far enough so you can use the Chaos Breaker. Keep using it and in about 40 turns, you should have beaten Dark Dragon. Make sure to leave the last head with 1 hp for Mawlock. This is a slower, but easier way to beat the game and get the Dark Dragon card.