The not-so-easy thing about drafting UW in Final Fantasy is that your deck can end up looking and feeling very different based on which kinds of artifact cards you actually end up with
Three are Esper (white, blue, and black), one is Grixis (blue, black, and red), one is Jund (black, red, and green), three are Mardu (white, black, and red), one is Abzan (white, black, and green), two are Sultai (blue, black, and green), and one uses all five colours.
While it does cost a good chunk to play, Mastermind is a great card overall
All three of Cloud's Magic versions Cloud, Ex-SOLDIER above all, but also Cloud, Midgar Mercenary and Cloud, Planet's Champion are indeed behind some of these spikes, but other MTG staples are also part of the equipment action
Less mana, ideally, and you lose the ability to loop the artifact, but in decks with high-power creatures, youre talking controlling a player for as little as 3 mana
Still, its a 6/6 flyer with trample