Whether youre playing Standard, Pioneer or Commander, Gix,Yawgmoth Praetor offers a ton of card draw for any decks that are employing a lot of creatures
If this strategy sounds familiar to you, its because these cards are all part of the Feather deck that has been a fringe player in Historic
The Firemind was almost always built as a Wheel deck, looking to string together cards like Wheel of Fortune and Windfall which allowed Niv to machine-gun down opposing creatures (and players) while digging for their Curiosity Combo: enchant Niv-Mizzet, the Firemind with Curiosity and then draw a card any way (like tapping Niv-Mizzet) to deal one damage to a player and draw one card as many times as you'd like, often killing all opponents in the process
In this situation, if you're Gaston you should absolutely avoid trading that Glass Golem for that Bronze Sableand if Belle has the opportunity to make that trade, she definitely should
I love this pair so much, and they are cheap on the secondary market as well, too, by the by