While the characters and abilities will appear in Disney Lorcana: The First Chapter as well, these specific Expo versions are exclusive to D23 and will feature a "unique foil treatment" along with symbols for D23 Expo and '1st Edition'
Any deck with the ability to pump out Thopters can use this card to cruise to an early victory Related Guardian Project A card with so-so viability in Standard that is an obscene powerhouse in singleton formats like Commander
I like Blight Herder as a cheaper but potentially strong midgame creature that brings along an army in a can similar to powerful creatures in the past like Siege-Gang Commander and Cloudgoat Ranger
People start spending too much money on that asset, and when it turns out to be worthless, the price collapses
We're all quite used to this effect on digital card games, especially in Hearthstone where cards that shuffle cards into the opponent's deck are fairly commonplace
For more information on double-faced cards, checklist cards, delirium, madness, and skulk, please see the Shadows over Innistrad Release Notes