Oh, fellow Traveler, you aren’t reading a misdated blog post—you’ve just stumbled upon a relic of the past that still makes veteran players chuckle and weep in equal measure. Back in the sweet summer of 2023, HoYoverse dropped the Genshin Impact 4.0 livestream, and with it came those glorious, limited-time redemption codes that promised a tiny Primogem sugar rush. Now, in 2026, these codes are about as useful as a Cryo slime in a Natlan volcano, but there’s a strange kind of nostalgia attached to them. So grab your popcorn (or your leftover Fruity Skewers) and let’s take a giggle trip down memory lane, while I remind you how things could have been if you owned a DeLorean.

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Before you start frantically copying those strings of characters, let me pull the emergency brake. The three codes that once made our hearts flutter were:

  • 3BRLL59ZCZKD — 100 Primogems and ten Mystic Enhancement Ore

  • WA845MQHUHKH — 100 Primogems and five Hero’s Wit

  • ZT8MLL8GCYKM — 100 Primogems and 50,000 Mora

Yes, you heard right: 300 Primogems in total. That’s barely enough for two wishes, but back then it felt like finding a treasure chest in an empty desert. And the kicker? These codes expired within roughly 24 hours. So unless you’ve mastered the art of temporal tampering, you’re about three years too late. But hey, maybe you’re reading this inside a mysterious domain where time doesn’t flow—if so, skip to the redemption steps below immediately! For the rest of us, let’s just call this a “what-if” safari.

How the lucky ducks claimed the codes (theoretically)

Even though these codes are deader than a hilichurl who picked a fight with the Raiden Shogun, the redemption process still holds up as the gold standard for all of Teyvat’s giveaways. I’ll walk you through both methods, just in case the Tsaritsa decides to reissue them for the lulz.

In-game redemption (the old-school route)

  1. Launch Genshin Impact and pray your ping is merciful.

  2. Open the in-game menu—you know, the gear wheel that’s been staring at you since AR1.

  3. Navigate to Settings, then tap Account.

  4. Click Redeem Now and punch in the code like you’re entering a secret level from a 90s game.

  5. Voilà! If the code were alive, your mailbox would suddenly shimmer with goodies.

Website redemption (for those who like to alt-tab)

  1. Head over to the official HoYoverse redemption site.

  2. Log in with your account and double-check you’ve selected the correct server region (Asia, Europe, America, or the mythical Twilight Serenitea Pot zone).

  3. Paste the code into the box and smash that redeem button.

  4. Collect the rewards from your in-game mailbox, then do a little victory dance.

Sounds simple, right? It was—until the timer ran out and the internet filled with despair posts. If only we could bottle that collective FOMO.

What you actually missed (besides the Primogems)

Now, let’s be real: the 4.0 livestream wasn’t just about the codes. It was our first proper look at Fontaine, the land of Hydro, fanciful hats, and a legal system that Paimon would definitely get tangled in. The showbiz siblings—Lyney, Lynette, and Freminet—were the shiny new toys. Lyney the charismatic magician, Lynette the stoic cat-eared assistant, and Freminet the quiet diver with a penguin pal. Those 300 Primogems could have gone straight into their debut banners. Instead, they vanished faster than a Seelie returning to its court. But hey, if you’re reading this in 2026, you’ve probably already snagged Fontaine’s 5-stars during reruns, so the pain has likely dulled to a mild, nostalgic sting.

The real lesson: treat every code like it’s your last

If there’s one pearl of wisdom I’ve gleaned from years of gacha life, it’s this: HoYoverse promotion codes are more fleeting than a shooting star in Mondstadt. Never sit on them. The moment you see a livestream announcement, set an alarm, prep your browser, and have your UID at the ready. In 2026, with Snezhnaya possibly looming (or maybe even Celestia!), you can bet the V6.0 livestream will bring its own batch of 300 Primogems and a fresh wave of panic-redemption. And when that day comes, you’ll remember this article, chuckle at the fossilized 4.0 codes, and smash that redeem button faster than a Dendro core reaction.

So, no, you can’t actually use ZT8MLL8GCYKM today. But you’ve just taken a delightful detour through Genshin history, and your redemption reflexes are now theoretically sharper. Keep your wits about you, Traveler, and may the next livestream bring you codes that you actually claim in time—and maybe a little more than 300 Primogems. After all, a new character costs a small fortune. Until then, I’ll be over here polishing my unused 4.0 codes, wistfully humming the Fontaine battle theme. Catch you on the next banner!