Enchantress of the Deep Sea
I am the weaver who dwells within every body of water. I am the endless seas, the quiet lakes, and the shallowest puddles. From a single drop of water can erupt a torrent that can drown your kingdoms. And so, you shall fear every drop...
This is a deck the leverages the Enchantress Avatar to manipulate the board using Aura spells and Flood effects. The deck has multiple ways to flood additional sites, drowning enemy creatures and increasing the size of your body of water. It's main game plan is to use flooding, removal and auras to disrupt the opponent, while building up a powerful board state.
Your early turns will be a bit slow, unless you draw one of the cost reducers. Once you have 3 or 4 mana, begin playing auras or removal spells to prevent the opponent from getting much done. Make sure to be careful when animating and playing your auras, to prevent them from being killed. You'll want to draw at least one or two sites in the early game, but after turn 4 you should draw a spell every single turn. You can tap the enchantress to draw more sites as needed.
This deck needs to be casting spells constantly to animate your auras. To facilitate this, nearly method of blue card draw has been included in either the main deck, sideboard, or maybeboard.
Flooding is another important part of the game plan. All of the non-aura creatures will have submerge and many of them have waterbound. You want to utilize the many different effects to extend your body of water into the opponent's sites and bash them to death.