Many Water cards can manipulate Energy , like moving it around, accelerating it, or even locking down opponents
having her in your deck in a great boon and can turn the table in your favor.
All you need to do is plop this baby down and then win ten flips
Meanwhile, for UW Flash, you have a bunch of value creatures, and while banning any one of Archangel Avacyn, Spell Queller, Selfless Spirit, or Gideon, Ally of Zendikar would hurt the deck, none of those cards really stick out as being too good in a vacuumthey are just very strong when combined together
Lets have a look at some of the monster cards that are hopefully going to steer you towards a shining victory: Michael, the Arch-Lightsworn (Level 7 Synchro, ATK 2600, DEF 2000) Straight off the box art, this Synchro monster has it all: a strong attack, solid defence, a disruptive first effect to banish one of your opponents cards for a price and a second effect that prevents you from decking out and regains some Life Points to boot
If a legendary permanent or an artifact entering or leaving the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.