Nonetheless, Terminate is a great creature removal which you should include if you are playing those colors
Casting Cost: Card Type: Creature - Elemental Incarnation Power / Toughness: 3 / 3 Card Text: Flash Flying When this creature enters, choose up to one target creature spell or planeswalker spell
Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches
Commander is often a reason for friends to hang out with each other, and playing something straightforward allows room for the conversation to flow
As it stands, though