Merfolk goes down again

I managed to lose to this group of characters, after taking the first game.  I don’t know what happened, I thought it was going to be an easy match.  Game 1 was pretty easy.  Game 3 opponent was able to Ghost Quarter his own land which was Spreading Seas’d to prevent a lethal attack.  Once the Geist of Saint Traft became a flyer, I wasn’t able to do anything.  I just couldn’t draw another Dismember.