In Final Fantasy VII, your weapons are a huge factor in the materia you can use, and Equipment is the Magic equivalent, hence why the deck was built around it
This ability made a second appearance on Drivnod, Carnage Dominus, which is a great addition to a Teysa deck but a worse stand-alone commander
You can use it as a sort of protective spell by responding to an opponents removal spell and copying the creature they attempt to kill, or surprise a creature like Niv-Mizzet, Parun in combat to trade
If that's the color pair's theme, then it's a great multi color card
It also has affinity for Birds, costing less to cast for each Bird you control
The first time I read it, I thought: Hey, its just Mystic Snake. But its not