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Star Ocean: The Second Story Rhas a plethora of mechanics that allow you to become incredibly powerful very early, as long as you know how to use them properly. With experience and proper planning, it’s very possible to break the difficulty of the game in half and acquire very strong items and weapons far earlier than intended.
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One such (infamous) item is the Aeterna, previously known as the Eternal Sphere in the PS1 version of the game. This sword is one of the best in the entire game for Claude and Dias, if not the best - and you can get it only a few hours into the game.
How To Make The Aeterna
The method to make the Aeterna is nothing if not drawn out - there are three discrete steps that you’ll have to take to make this fantastic sword.
This will require some setup - each step is detailed in the sections below.

There will bespoilers for the possible results of the Lacuer Tournament arcof the game.
The Aeterna has a whopping1,600 ATK stat, one of the highest in the game without delving into the optional dungeon. In addition, every attack with this sword launches stars that also attack enemies, turning your attack into barrages that shave off massive amounts of enemy HP, if it doesn’t destroy them completely. A word of warning: acquiring this sword is the single best way todestroy the difficulty of the game, so buyer beware!

How To Get To The Finals Of The Lacuer Tournament
You’ll encounter the Lacuer Tournament as part of the story, so progress the game until you’ve reached this point. The key here is that Claude must win every battle up to the final one against Dias, which is impossible to win.
In addition, equip him with goodSpecial Skillsand make sure they’re levelled up.Helmet Break and Meteor Palmare good picks.

How To Get The Deadly Edge
Despite losing to Dias, as long as Claude actually fought him, you’ll be able to acquire theDeadly Edge. If this didn’t happen, you won’t be able to get the Aeterna on this playthrough - hopefully you have a saved game before the tournament!
After the tournament,head to the blacksmith’s house on the west side of Lacuer and enter his home. A cutscene will play out in which you’ll get theDeadly Edge.

This is already a fine weapon, but we can make it even better.
How To Get Mithril
The key to this process isMithril, a high-level material that you usually cannot acquire at this point in the game, especially not in the quantity you need.
To get Mithril early, you’ll need tospend someSPand spare time. The method here is tolevel up a character’s ESP skill- whenever ESP is levelled up, you’ll gain a random item from a list -Mithril is on that list.
The ideal process is as follows:
The chances of getting Mithril from an ESP level-up is low, but it shouldn’t take too long before you acquire both in a single level-up session.
Crafting The Aeterna
Turning the Deadly Edge you acquired earlier is something thatonly Claude can do, despite Dias also using swords. To do this, you’ll need toCustomise the Deadly Edge with Mithril.
Mithril is a high-rank material, soyou’ll need Claude’s Blacksmithing level to be quite high- at least seven levels is enough to complete the process without too much wasted time.
SuccessfullyCustomising the Deadly Edge with Mithril will turn it into the Blade of Minos. This is a great sword, but we can instantly make it even better.Customise the Blade of Minos with Mithril, and you’ll get the Aeterna.
If your chances of success with either of these Customises are less than 100 percent, ensure yousave before attempting it. Reload the game if you fail and try again until you have this amazing sword.