These interactions may not make it into top-tier decks any time soon, but the fact that they exist is exciting in itself
With this in mind, it seems unlikely that Glorious End will show up in the main deck, but it could be a sideboard option for specific matchups (it's a hilariously effective way to win the mirror)
The four toughness is easier to take on for blockers, but most players would rather spend removal before the annihilating attack comes, and the broad-reaching hexproof is great
Although it was the first time Gem Mint Cards was targeted, similar smash-and-grab thefts have occurred across the region in recent months, according to News 6
It has no special rules meaning other than being a designation that the ability (and, theoretically, other effects) can see
First, its a cheap commander at 2 mana, and you can get around commander tax by sacrificing a creature and returning it to your hand