For my battle against

, I was actually thinking of building a water/gravity deck, something like:
5x momentum
1x gravity shields, because air is one of the few elements who's dragons have 6 hp's.
2x black hole (black hole is always annoying, especially when you do some calculation, for example, use it the first time your opponent reaches 10 quanta, meaning he can't play the dragon he wanted to play that turn)
2x ice shield, just to get a better chance of drawing one
5x ice dragon, ice dragon with momentum would meant they would need both spiders, and lobo to make it non hitting
Ice bolts, to kill any creatures that get past the shield (wyrm's)
Water pillars and pendulums
We could use a deck like this for life too, to pown a quinted dragon deck, but I doubt they will use that one again.