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Maelstrom of the Spirit Dragon can help to cast Dragons and Omens

There are a lot of other lands in this deck that do similar things to Cavern of Souls, so you could always cut it and replace it with either another dual land or a basic land

As recommended in the booklet, this can be paired with Crystallize to great effect

Once a permanent you control leaves the battlefield, Aether Revolt's revolt ability will apply to noncombat damage dealt by sources you control until the turn ends or Aether Revolt leaves the battlefield, whichever happens first

If I'm playing a creature-based aggressive deck, I might prefer more creatures or a more flexible removal spell like Lightning Strike

Most blue and red things in most cubes are cards you can "get away" with in Izzet tempo