Each region will still receive the same card, but "the art and language of the card will match the language of the display purchased." This means you can always expect to pick up Gala Greeters, a green 1/1 Elf Druid Creature, but the outfits and locales you find them in will be unique
Then you can tap it for three and then mill everyone else cards equal to their hand size, which could easily be quite a bunch
We don't recommend them, for different reasons

Release date: 2022-10-18 Prowl, Pursuit Vehicle Prowl, Stoic Strategist Ratchet, Field Medic Ratchet, Rescue Racer Jetfire, Air Guardian Jetfire, Ingenious Scientist Blitzwing, Adaptive Assailant Blitzwing, Cruel Tormentor Starscream, Power Hungry Starscream, Seeker Leader Slicer, High-Speed Antagonist Slicer, Hired Muscle Arcee, Acrobatic Coupe Arcee, Sharpshooter Blaster, Combat DJ Blaster, Morale Booster Cyclonus, Cybertronian Fighter Cyclonus, the Saboteur Flamewar, Brash Veteran Flamewar, Streetwise Operative Goldbug, Humanity's Ally Goldbug, Scrappy Scout Megatron, Destructive Force Megatron, Tyrant Optimus Prime, Autobot Leader Optimus Prime, Hero Soundwave, Sonic Spy Soundwave, Superior Captain Ultra Magnus, Armored Carrier Ultra Magnus, Tactician Prowl, Pursuit Vehicle Prowl, Stoic Strategist Ratchet, Field Medic Ratchet, Rescue Racer Jetfire, Air Guardian Jetfire, Ingenious Scientist Blitzwing, Adaptive Assailant Blitzwing, Cruel Tormentor Starscream, Power Hungry Starscream, Seeker Leader Slicer, High-Speed Antagonist Slicer, Hired Muscle Blaster, Combat DJ Blaster, Morale Booster Cyclonus, Cybertronian Fighter Cyclonus, the Saboteur Flamewar, Brash Veteran Flamewar, Streetwise Operative Goldbug, Humanity's Ally Goldbug, Scrappy Scout Megatron, Destructive Force Megatron, Tyrant Optimus Prime, Autobot Leader Optimus Prime, Hero Soundwave, Sonic Spy Soundwave, Superior Captain Ultra Magnus, Armored Carrier Ultra Magnus, Tactician

So, in original Mirrodin , I was looking for quirky artifact designs and came up with the following card: Lucky Coin 1 Artifact Whenever you would flip a coin, instead flip two coins and choose which one not to count
And this is doubly true since by increasing supply, Secret Lair reprints tend to reduce the value of the older, cheaper versions of the cards featured in the drops, potentially allowing you to pick up less desirable (but just as playable) versions at a discount