If you think about how Baral Gifts usually plays, it wants to cantrip on Turn 1, resolve a Baral, Chief of Compliance or Goblin Electromancer on Turn 2, Gifts Ungiven on Turn 3, and then win the game
This is the third Modular deck I've made, the first being Modular Kicker and the second Modular Auras
Green decks can take this further, and there are some legendary matters synergies that might lure greedy drafters towards a four- or five-color build, but this is nowhere near as viable as in, say, Tarkir: Dragonstorm
This is probably efficient enough to slide into some non-energy UW lists, but for dedicated energy decks its an A+
Summon: Bahamut Summon: Bahamut is devastating with two chapters like a Meteor Sword