Okay, let's talk about the New Eridu City Fund because, honestly, it's one of those systems that quietly hands you a pile of goodies if you know what you're doing. I've been grinding through these seasons for a while now, and even though the specific Version 2.4 window ran from the update all the way to December 29, 2025 at 03:59 server time, the core loop hasn't changed much in 2026. So if you're a Proxy looking to level up your account, here's my no-fluff rundown.
First things first, you need to unlock the thing. You won't even see the City Fund tab until you've unlocked Combat Simulation in Main Story Chapter 1, "Cat's Lost & Found." That's your gateway. Once that's done, the Basic Plan automatically unlocks at the start of each season. No purchase needed — you just play, complete Expansion Tasks, earn experience, and raise your Fund Level. Simple, right?
Now, here's where the real loot comes in. You can grab the Growth Plan or go all-in on the Premium Plan. If you started with Growth and later get tempted, you can pick up a Plan Upgrade to bump yourself to Premium. It's a smooth transition, no drama.
Let me break down the plans a bit:
| Plan | How to Unlock | Key Rewards |
|---|---|---|
| Basic Plan | Automatic at season start | Standard rewards as you level up |
| Growth Plan | Purchase | Encrypted Master Tapes, Selectable A-Rank W-Engine at Lv. 30 |
| Premium Plan | Purchase or Plan Upgrade from Growth | Exclusive avatar Maple Rest, exclusive namecard One Denny's Autumn Outing, plus all Growth Plan rewards |
The Growth Plan and Premium Plan both give you Encrypted Master Tapes and a Selectable A-Rank W-Engine when you hit City Fund Level Lv. 30. Let that sink in — a selectable A-Rank W-Engine is huge if you're trying to fine-tune a build without praying to the gacha gods. And the Premium Plan? That's where the cosmetic flex lives. You get the avatar Maple Rest and the namecard One Denny's Autumn Outing. These are exclusive, tied to the current City Fund period, so once they're gone, they're gone.
Speaking of "gone," there's a time-limited item you need to watch: the Great Builder's Certificate. After unlocking the Growth Plan or Premium Plan and reaching City Fund Level Lv. 30, you can claim it. But here's the kicker — it does not carry over to the next New Eridu City Fund period. If you don't use it within the time limit, it expires automatically. No joke. I've seen too many Proxies let it rot in their inventory because they didn't read the fine print. Use it or lose it.
Let me put the key timing in a clean little list, because the original event had some specific cutoffs that could trip you up:
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Event duration: After the Version 2.4 update – 2025/12/29 03:59 (server time)
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Purchase deadline for Growth Plan, Premium Plan, and Plan Upgrade: 2025/12/29 02:59 (server time)
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After purchasing closes: You can still complete Expansion Tasks and claim rewards
Notice that one-hour gap? Purchasing closes at 02:59, but the event itself runs until 03:59. So if you were planning to buy at the last second, you'd better not wait past 02:59. That little detail saved my bacon once. In 2026, every new season will have similar cutoff windows, so always check the in-game timers. The New Eridu City Fund page in-game has all the specifics, and I always peek at it before committing.
Now, let's get real for a second. Is the Premium Plan worth it? For me, yes — if you care about exclusive cosmetics and want the extra pulls. The Encrypted Master Tapes alone are a solid reason to grab the Growth Plan. And being able to pick your A-Rank W-Engine instead of leaving it to chance? That's chef's kiss. But if you're purely free-to-play, the Basic Plan still gives you a steady drip of rewards as you complete Expansion Tasks. You won't starve.
One more thing I want to highlight: the Great Builder's Certificate is not just another inventory trinket. It's a limited reward for the current City Fund period. The game explicitly says it won't be retained for the next period. So treat it like a discount coupon with an expiration date. Use it on something meaningful before the season ends, or watch it vanish into the void.
To wrap it up, the New Eridu City Fund is basically a season pass that respects your time if you pay attention. Unlock Combat Simulation early, complete those Expansion Tasks, decide between Growth and Premium, and don't let time-limited rewards expire on you. It's a chill way to stack Encrypted Master Tapes, grab a Selectable A-Rank W-Engine, and flex the Maple Rest avatar and One Denny's Autumn Outing namecard. Just remember: the clock is always ticking, and the Great Builder's Certificate won't wait.
That's my take, fellow Proxies. Go raise that City Fund Level and claim what's yours.