A first for me!! Not only art, but story too! I hope you guys enjoy this lil micro+caging blurb!
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"No!!!"

The cry rung out across the table as the final dice landed on a meager 4, the druid failing his death saving throw. Each of the players mourn in their own ways; throwing their hands up, groaning, shrieking, whining, at the loss of the last character standing. The campaign had lasted several sessions, a handful of minor bosses defeated before now- a fact that may well have led to their hubris entering the encounter.

"That's crazy!" The paladins player moans, hands pulling at her hair in frustration. "Seriously, what was that boss's AC?"

"For real!" The barbarian pipes in, unintentionally smacking her hand on the table with a yelp. "That was way beyond our level."

Smiling wryly, the DM sits back in their chair before shaking their head with a sigh. "I told you guys as much; you weren't supposed to meet this boss yet, but you put your noses where they didn't belong."

"Yeah but there's 'warning us' and then telling us we're out of our league!" The barbarian insists as she nurses her injured hand in the other. On her other side, the ranger is going through his character sheet, as if it held answers as to how they lost so badly.

"You don't always get those warnings in life." The DM reminds them all gently, looking over their glasses at those around the table. "If a DM warns you, you should take heed. This campaign is over- but that doesn't mean we can't enjoy plenty more games in the future. In fact-"

Pausing with one finger held up, the DM leans over to grab a small velvet pouch from their bag of campaign goodies, standing up in order to offer the pouch over their screen. The players can't see inside it, but the all too familiar clack from inside tells them what it is without looking.

"Go ahead and take one. To commemorate our first game! They're special-made." The DM explains, giving the pouch a jostle to invite the players to reach in.

The initial reception is less than joyous, but the defeated players begrudgingly take their consolation prize one by one. Each pulls out a dice, as expected, but what's not expected is the quality. The material is like a prism, colors playing along the surface, while the edges have a slim, metallic finish, the whole effect not unlike a lantern. The excellence of the craftsmanship is not lost on the players, whose sour feelings turn to wonder as they examine their different sided die.

"Holy shit dude, is this some kind of-" The ranger asks as he rotates the d10 in his fingers, eyes glued on the colors. He's cut off however, by those very colors- or moreso, how those colors flare as if lit from within. Not just the ranger, but every player finds themself blinded by an array of colors from their gift, and consequently winded as if falling from a great height. Once the startlement begins to clear though, it only gives way to confusion.

Leaning forward, the DM grins as they look down on the table at their new set of custom dice. Chairs sit empty around them now, their contents now transferred inside the crystalline baubles. Seeing the now-miniature figures moving around inside the dice, the DM chuckles before tut-tutting.

"Now, now, you guys are experienced enough to know you should always cast 'detect magic' on any items given to you by mysterious, powerful beings." They chide with a broad grin as they wag a finger. Any admonishment they receive in turn is muted; both by the players miniscule size, and magical prisons, and is soundly ignored as they scoop up their new dice set with an intentional jiggle. The players topple and slide against the various sides of the dice they're each trapped in, the crystal too slick to get any grip on.

With a mischievous giggle, the DM gives a good shake before tossing the dice, eyes flickering between each one as they spin across the table. The barbarian and paladin clack together, the sound tiny to the DM but resounding to the captives. Folding their screen, the DM leans in to see the results, and hums as the dice finally settle.

"Not bad, not bad!" They congratulate with a few mocking claps. Not that the players can see how high they were rolled, with how nauseous they are from the G forces. "You guys will make a great set to play against the next campaign!"

Clearing the space, they let their players see the dice they had been using behind the screen; identical to theirs in every way, short of the unfortunate souls trapped inside. Scooping up the old set, the DM drops them into a wooden box and seals the old group away. Picking up the pouch again, they then deftly transfer the new set into it, smiling down through the opening.

"I did tell you," they say cheerfully to the devastated faces within, before cinching the bag shut. "We're gonna enjoy plenty more games in the future!"