You can get extra power and board presence from Chishiro, the Shattered Blade, fantastic ramp from Kodama of the West Tree, and even extra combats from Akki Battle Squad
Like transforming cards, MDFCs only count as their front face anywhere but the battlefield or the stack
I decided to go with something in-between these two extremes, but leaning more on the "super jank" side
Whenever enchanted Forest is tapped for mana, its controller adds one mana of the chosen color to his or her mana pool (in addition to the mana the land produces).) Merfolk Branchwalker: That reads versatile and like an auto-include in the Standard Merfolk deck
There are sorceries, instants, artifacts, and enchantments that all have the tribal type tacked on