What you want out of a deck box is something solid, that protects your deck if you drop it, splash it, knock it over, or get it stuck
The Emerald/Sapphire deck is by no means bad, and I enjoyed utilizing the various Inventors, but it does seem to require a bit more strategizing, whereas the Amber/Ruby feels more aggressive
You could build it up as a Voltron commander and make use of this to commander damage your way to victory, or fill it up with other ways to dish out damage like Roiling Vortex and Guttersnipe
Merieke Ri Berit If youre a control player, its very likely you enjoy having access to the coolest creatures on the battlefield even if they dont belong to you
Its attack trigger adds a pretty big amount of randomness to the game, especially as it can force opponents to discard combo pieces or key cards from their hands
this is where Spectra Ward comes into play to bypass any blockers and also to give protection to your creature in one more layer