Need card draw. Splash blue for distant melody? Would have to run a single island, which could be fetched with one of the 6 terramorphic/evolving wilds.

Already have the best green fit for this deck in bequethal. Faithless looting for red? Might make sense as this is really a combo deck and I often have two many of something and not enough of something else. Faithless looting enables me to replace two redundant cards with cards I need.