Blue is one of the best control colors in Commander
This means that aggressive decks with more than one colour can steeply benefit from lands like Starting Town, which will allow them to make powerful plays at the start of the game, no matter the colour of the card they're casting
Cheap burn to clear away small critters makes her edict ability much more potent and the cheap nature of the deck makes the discard ability rather one sided, not to mention filling up graveyards for Lavamancer and Deathrite Shaman
So you could make a deck of unlimited Plains and Shararazads, keep starting more and more game-within-games, and eventually win by running your opponent out of cards
This creature enters with a +1/+1 counter on it for each card revealed this way
Additionally, this can be used with various ETB effects to generate valu, costing only one mana