The blue plains devastates with magic attacks. So use cards like abraca amadeus, blue eye magic ring, and Elven Bullying.
This landscape also uses shield spells, so if you run an all blue plains deck, be sure to use lots of shields and magic attacks.
Blue plains cards also use block and slow, so use those cards too.
Then you have crystal ball, a special card where you draw a card and if a creature has a shield, you draw another card.