User blog comment:Shiroyabun/Tried out the demo decks!/@comment-11372432-20131223060827

I'm not surprised that the games are short. The fact that you can call any monsters out at any point (gauge notwithstanding) and some can deal almost half of the starting 10 life when directly attacking is what led me to believe this.

As for the impact cards, Gargantua Punisher! is a game ender, so naturally it would only be useful at that point, but there are other ones like Drill Bunker that can be used at any point, so saying use only two or three impact cards might be only applicable to Gargantua Punisher!