If you’re playing Aion 2, one item you’ll come across frequently is the Radiant Theostone Chest (Bound). For newer players, and even some experienced ones, it’s easy to get confused about how this chest works, what you can get from it, and the best ways to use it. In this guide, I’ll explain everything about this chest based on how most players approach it in the game.
What is the Radiant Theostone Chest?
The Radiant Theostone Chest is a special reward chest that contains stones infused with divine power. These stones, called Theostones, are used to enhance your gear in the game. In general, the chest gives one type of Rare to Epic grade Theostone, and which grade you get depends on a fixed probability. That means there’s no way to guarantee an Epic stone every time—you can get Rare, Rare+, or Epic stones depending on the chest's chance table.
Here are some basic properties of the chest:

• Item Level: 0
• Equip Level: 1 (so you can open it as soon as you start)
• Tradable: Yes
• Storable: Yes
• Enchantable: Yes
• Decomposable: Yes

Because it’s tradable and storable, most players will keep it in their inventory until they have the right moment to use it or trade it.
How Do You Use the Chest?
Using the chest is straightforward. Once you have it in your inventory:

1. Open the chest like a normal usable item.
2. Receive one Theostone. The grade (Rare, Rare+, Epic) is determined by the chest's probability.
3. Check your inventory for the new stone.

Most players usually wait to open these chests when they have a clear plan for upgrading their gear. Opening them randomly is common for beginners, but experienced players try to time chest openings for when they really need a specific Theostone grade.
Where Can You Get Radiant Theostone Chests?
In general, there are a few ways to obtain these chests in Aion 2:

• Quests: Some mid- to high-level quests reward Radiant Theostone Chests upon completion.
• Events: Occasionally, game events may provide these as event rewards.
• Drops: Certain elite mobs or dungeon bosses have a chance to drop them.

Most players find that quest rewards are the most reliable source, while drops can be hit-or-miss.
What Theostones Are Most Useful?
Once you open a chest, you’ll get a Theostone, but which one is most useful depends on your class and build. In general:

• Rare Theostones: Most players use these early in the game for basic gear upgrades.
• Epic Theostones: Usually reserved for late-game gear, since they provide the highest stat bonuses.
• Stat Types: The stones can boost attack, defense, magic, or hybrid stats. Experienced players often plan which stone to use on which piece of equipment rather than randomly applying them.

It’s important to look at the grade and type before using a Theostone, because once applied, it can affect long-term equipment progression.
Trading and Economy Notes
Because the Radiant Theostone Chest is tradable, some players buy and sell them to optimize their gear upgrades. In general, most players do not rely on trading for high-grade stones, but some prefer using in-game shops to top off resources. For example, if you need currency to buy chests or stones, a trusted U4N shop for Aion 2 kinah is one way players usually secure extra kinah safely.
Decomposition and Enchanting
The chest itself can be decomposed or enchanted, although most players rarely enchant a chest directly. Decomposing is usually done if you have duplicate chests or don’t want to risk opening it immediately, as decomposition can sometimes provide crafting materials or smaller Theostones.

• Decomposing: Some players do this when their inventory is full or if they need crafting materials.
• Enchanting: Not very common for the chest itself, but you can use Theostones obtained from it to enchant your gear.

Tips from Experienced Players
Here are a few practical tips most experienced players follow:

1. Don’t open chests immediately: Wait until you know which equipment you want to upgrade.
2. Plan your Theostones: Rare stones are good for early gear, but save Epic stones for late-game upgrades.
3. Check the market occasionally: Even though the chest is tradable, most players open them for stones rather than selling.
4. Manage inventory: These chests can take up space if you accumulate a lot; storing them in your warehouse is a common practice.

In general, careful planning around Theostone usage saves time and kinah in the long run.

The Radiant Theostone Chest (Bound) in Aion 2 is a simple but important part of gear progression. Most players will open them when needed, use the Theostones to upgrade specific equipment, and sometimes trade or decompose duplicates. Knowing when to open chests, which stones to prioritize, and how to manage your inventory can make a noticeable difference in progression efficiency.
By following the common practices outlined here, you can make the most of these chests without wasting resources or missing out on important upgrades.