It does little good to have a graveyard filled with powerful removal if they have no creatures on the battlefield, and unlike Snapcaster Mage, Dark-Dwellers is a card you want to cast on-curve so you can start attacking with the sizable body
Perhaps its best card comes courtesy of the Supreme Victors set and sees the aquatic serpent floating high above the clouds with the sun setting somewhere distantly on the horizon
Cunning as ever, the sea witch plays by her own rulesand with her own all-new special deck
Additionally, there's no real reason to play this card when Three Steps Ahead is already so powerful, and only sees a max of one or two copies in current Azorius Control lists
Sun Titan + Apprentice Necromancer for repeatable reanimation of any 3 CMC or less permanents for only one mana
Other Mechanics Were pretty much done with the Pokmon card game rules, but there are a few more mechanics Id like to touch on