Well, let me tell ya, “Eternal Calculus” is some mighty fine thing in the game Honkai: Star Rail. I ain’t too savvy with all them fancy terms, but I’ll try my best to explain it in plain words. So, this here thing, they call it a “Light Cone,” which is sorta like a special tool that gives your characters extra power. Now, you might wonder, “What in the world does it do?” Well, it boosts your character’s ATK (that’s attack power, mind ya) and SPD (that’s how fast they move), and the more enemies you hit, the stronger they get! That’s right, hit a bunch of them bad guys, and your character gets quicker and packs a bigger punch.

Now, I’ve heard tell that this here “Eternal Calculus” works best when you got three or more enemies. They say if you hit them, your character’s SPD goes up by 8%, and it’ll last for a turn or two. Sounds mighty good, don’t it? And this light cone don’t just work for anyone. You gotta have a character following the Path of Erudition. I ain’t too sure about what that path is, but from what I gather, it’s for them folks that rely on knowledge and smarts, like some kind of brainy type of fella or gal.
Let’s talk about who’d be real good with this Light Cone. From what I hear, characters like Jade, Bennett, Kaeya, and Himeko are the ones that benefit the most. You get ’em this here “Eternal Calculus,” and their attacks hit harder, and they move faster, giving them a better chance at taking out all them enemies real quick. So if you got any of them folks in your crew, it’s a mighty good idea to slap that Light Cone on ‘em.
But hold on now, just having this Light Cone ain’t gonna cut it. You gotta go out and get it. Some say it’s a 5-star item, and them good ones don’t come easy. You’ll have to farm for materials, make sure you’re ready to grind a bit. I reckon it’s worth the trouble if you ask me, though, especially if you’re lookin’ to make your characters real strong in battle.
There’s a lotta other Light Cones out there, but this one, “Eternal Calculus,” is somethin’ special. It’s all about hittin’ multiple enemies and gettin’ stronger each time. If you get yourself one of these, you’ll see a good ol’ improvement in your characters, especially when you’re up against them tough foes.
Now, I ain’t saying you should throw all your eggs in one basket with just this here Light Cone. There’s other ones, like “Geniuses’ Repose,” which is a good one for Herta if you ask me. It boosts her attack and gives her a little CRIT DMG boost when she takes down an enemy. But for now, let’s stick with “Eternal Calculus,” which sure does help in a lotta ways.

If you’re curious about how to get this Light Cone, it’s all tied up with the Path of Erudition characters. These folks are the ones who rely on strategy and brainpower, so it’s real important you get the right fella or gal for it. You’ll be able to make ‘em stronger, faster, and a lot more powerful in battles.
So, to wrap it all up: if you’re lookin’ for a way to boost your Erudition characters, give “Eternal Calculus” a try. It might take some time to get it, but once you do, you’ll see them characters really shine. They’ll attack harder, move quicker, and take out those enemies like a hot knife through butter!
Tags:[Eternal Calculus, Light Cone, Honkai Star Rail, Erudition, SPD boost, ATK boost, Jade, Bennett, Kaeya, Himeko, farming materials, Path of Erudition, 5-star Light Cone]