It will only add an extra blue mana for cards with the Island typing, but since that's so many of your lands, this won't be much of an issue
Theres not a lot you can do about this, since enchantments are pretty central to what the deck is doing
+1 - Target other creature gets +1/+1 until the end of the turn for each Plains you control
They gain trample, lifelink, and haste until end of turn
Path to Exile and Rapid Hybridization provide some instant-speed removal, Chart a Course , Cut a Deal , and Rowdy Research provide card draw, and Calamity of Cinders , Dusk/Dawn , and Time Wipe are your requisite board sweepers
6 Hypnotic Specter Limited Edition Alpha - $857.38 One of the original boogeymen of Magics early days, Hypnotic Specter is a neat little 2/2 Specter creature for three mana that while initially ignored by early Magic players, quickly took over the game