Milotic from Primal Clash, in conjuction with AZ and Super Scoop Up is a very efficient way of returning Double Colorless Energy from the discard in Standard play. This new, "cancer" Night March deck is getting very popular, and is one of the strongest decks in the format right now. Super Scoop Up and AZ are used to return Milotic to your hand, so that you can use its Sparkling Ripples Ability over and over. You can also use them to remove Shaymin-EX (a key part of your draw enegine) from the field so your opponent can't Lysandre them for easy prizes.
Another card many players are running in Night March now is Target Whistle, which lets you put a Basic Pokemon from your opponent's discard onto their Bench. You do this to revive Shaymin or other Pokemon-EX, then you Lysandre them up and rack up Prize cards quickly.