
All Star Tower Defense X, inspired by AAA video games, introduces an innovative “Skill Tree”mechanic that allows players to enhance their units significantly. This exciting feature enables you to unlock unique skills that provide a competitive edge against the relentless waves of enemies. By customizing your units’ power-ups, you can increase their damage, attack speed, or attack range, creating a robust team ready for battle. In this comprehensive guide, we’ll delve into the specifics of how the skill tree functions in All Star Tower Defense X and outline the process for unlocking skill trees for your units.
Understanding the All Star Tower Defense X Skill Tree
The Skill Tree offers players a chance to unlock distinctive abilities for their units, specifically for 5-star or Unbound units. To utilize this feature, players must summon these specific units and reach level 18 or higher within the game.
Key Features of the ASTDX Skill Tree
Upon entering the Skill Tree through the Grand Elder or from a unit’s interface, you will encounter a screen displaying branches, nodes, and the progress bar for your unit’s skill tree. Below is a guide to the various functions available on this screen:
- Damage: Selecting this option allows you to activate nodes that enhance your unit’s damage output.
- Speed: This selection enables you to unlock nodes focused on improving attack speed or reducing cooldown times.
- Range: Activating this option unlocks nodes that enhance your unit’s attack range.
- Fast Unlock: You can spend a specified amount of skill orbs to unlock all nodes along a branch, excluding duplicate nodes and hidden special moves.
- 4 Empty Cells: These slots include all unlocked special ability moves once acquired.
- Locked Units: Positioned to the right of the empty cells, three locked units become accessible upon using the same unit to unlock a duplicate node in the tree.

Unlocking Nodes in the ASTDX Skill Tree
Now that you are familiar with the elements of the Skill Tree interface, let’s explore how to unlock nodes within your unit’s skill tree. To initiate this process, you will require Skill Orbs.
Be aware that skill orbs come in various colors. You can only utilize orbs that match your unit’s color to unlock nodes. Otherwise, you must acquire Pure Skill Orbs, transform them into the desired color, and then proceed to unlock the nodes.
Choose a path—Damage, Speed, or Range—to capitalize on unit upgrades. Select starting nodes and hit the Confirm button to expend the necessary skill orbs for unlocking.

Understanding Dupe Nodes and Special Nodes
Each unit’s skill tree contains three additional dupe nodes, which are essential for progressing through the tree. Unlocking these nodes allows you to explore other branches once you have maxed out a specific path.
In All Star Tower Defense X, you can activate dupe nodes by utilizing the same 5-Star or Unbound unit linked to the skill tree you’re improving. A total of four units will be necessary to unlock all potential nodes within the skill tree.
By the end of a particular branch, players have the chance to unlock a special ability node. This node grants passive abilities, such as a 10% Critical Chance or a 10% Elemental Boost, tailored to the chosen path.
Once obtained, these special abilities fill the previously mentioned empty cells in your skill tree, enabling you to unlock dupe nodes and ultimately optimize your unit’s potential.
Accessing the Skill Tree in All Star Tower Defense X
After acquiring a 5-star or Unbound unit and reaching level 18, follow these instructions to access the skill tree for your desired unit:
- Navigate to the Grand Elder chamber, located to the left of the Summoning Area.
- Position yourself within the green-highlighted area inside.
- Press the ‘E‘ key to interact with the Elder.
- Select the dialog option labeled Hidden Potential.
- Choose the 5-star or Unbound unit you wish to enhance, then click Confirm.
- This action will direct you to the Skill Tree map, where you can select your preferred enhancement path.


Alternatively, you can directly select any 5-star or Unbound unit and click the three dots icon situated next to its stats to access its skill tree.
Acquiring Skill Orbs in All Star Tower Defense X
A practical method for obtaining skill orbs is to complete battles within the Challenges area. This section is recommended for players at level 20 and above, providing an excellent opportunity to test your strongest units while earning skill orbs for skill tree enhancements.

Engage in daily challenges or those that refresh every 30 minutes in ASTDX to collect various colored skill orbs.
As an alternative, consider participating in challenges that reward you with Pure Skill Orbs, as they can be transformed into skill orbs of any color, facilitating the unlocking of nodes for your chosen unit. Lastly, you may also redeem All Star Tower Defense X codes for complimentary skill orb bags.
With all this information in hand, which 5-star or Unbound unit do you consider the best in the game right now? Share your thoughts in the comments below!
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