- All Star Tower Defense X alchemy summon: The primary method for acquiring units using Gems in the lobby area.
- Banner Mechanics: Two distinct banners (X and Y) refresh every hour at different intervals for varied unit pools.
- Pity System: Guaranteed 5-Star unit at 100 summons and Unbound unit at 2000 summons.
- Summon Rates: Standard 5-Star units have a 1% drop rate, while Unbound units are extremely rare at 0.01%.
- Optimal Spending: Always use the 10x Summon option to save 10% on total Gem costs.
Core Summoning Mechanics in ASTDX
The summoning system serves as the heartbeat of progression in this experience. Located centrally within the game lobby, the summon area is where players exchange hard-earned Gems for powerful units. For those looking to save time, the Warp button in the user interface allows for instant teleportation to this zone, ensuring you never miss a banner rotation.
The process of an All Star Tower Defense X alchemy summon involves more than just clicking a button; it requires an understanding of how units are generated. Most units in the game are obtained through this system, including the rare shiny variants and units with unique Traits. When you initiate a summon, the game rolls against a specific table of probabilities to determine your reward.
If the banner timer expires while you are in the middle of a summoning session, the game will still grant you units from the previous banner pool. This is useful if you are chasing a specific unit in the final seconds of a rotation.
| Feature | Description |
|---|---|
| Location | Central Lobby / Warp Menu |
| Currency | Gems (obtained via Story, Infinite, or Codes) |
| Variants | Standard, Shiny, and Trait-boosted units |
| Refresh Rate | Hourly (XX:00 for Banner X, XX:30 for Banner Y) |
Banner X vs. Banner Y: Comparison and Schedule
Understanding the distinction between the two primary banners is crucial for efficient team building. While both banners offer units ranging from 3-Star to Unbound rarity, they operate on different schedules and feature unique high-tier units.
Banner X
- Refresh Time: Every hour at the top of the hour (e.g., 1:00, 2:00).
- Exclusive Unit: Features the Spider Boss as a primary target.
- Unit Pool: One 5-Star, two 4-Stars, and three 3-Stars.
Banner Y
- Refresh Time: Every hour at the half-hour mark (e.g., 1:30, 2:30).
- Exclusive Unit: Features Michishibo as a primary target.
- Unit Pool: Shared rarity distribution with Banner X but different characters.
The "Alchemy" aspect of the summon refers to the potential to pull units with specific Traits. These are random modifiers that can significantly alter a unit's performance, such as increasing range, damage, or reducing placement costs. Additionally, every unit has a Shiny variant, which provides a distinct aesthetic upgrade and often serves as a status symbol among veteran players.
Do not assume both banners contain the same units. Always check the display board in the lobby to see which 5-Star unit is currently featured before committing your Gems.
| Banner Type | Refresh Interval | Notable Units | Rarity Range |
|---|---|---|---|
| Banner X | Hourly (XX:00) | Spider Boss | 3-Star to Unbound |
| Banner Y | Hourly (XX:30) | Michishibo | 3-Star to Unbound |
Probabilities and the Pity System
The All Star Tower Defense X alchemy summon system is governed by strict mathematical probabilities. To protect players from extreme bouts of bad luck, the developers have implemented a "Pity" system that guarantees high-rarity pulls after a certain number of attempts.
The standard rates for any given summon are as follows:
- Unbound: 0.01% (Extremely Rare)
- 5-Star: 1%
- 4-Star: 8%
- 3-Star: 27%
The pity counter is persistent. You can track your progress toward the 100-summon 5-Star guarantee by checking the summon interface. This ensures that even the unluckiest players eventually secure top-tier units.
The cost-efficiency of summoning is significantly higher when performing multi-summons. By opting for the 10x summon, players receive a 10% discount, which adds up to massive savings over long-term play.
| Summon Type | Pity Requirement | Cost (Gems) | Total Pity Cost | Savings |
|---|---|---|---|---|
| 1x 5-Star | 100 Summons | 50 Gems | 5,000 Gems | 0% |
| 10x 5-Star | 100 Summons | 450 Gems | 4,500 Gems | 10% |
| 1x Unbound | 2000 Summons | 50 Gems | 100,000 Gems | 0% |
| 10x Unbound | 2000 Summons | 450 Gems | 90,000 Gems | 10% |
Steps to Execute an Effective Alchemy Summon
To maximize your results when engaging with the summon system, follow this standardized procedure. This ensures you are always summoning on the correct banner and utilizing your Gems with maximum efficiency.
Check the Current Rotation
Teleport to the Summon area and inspect both Banner X and Banner Y. Look for units that complement your current team composition or provide necessary elemental coverage.
Verify Your Gem Balance
Ensure you have at least 450 Gems before summoning. Single summons (50 Gems) are less efficient and should only be used if you are exactly a few pulls away from hitting a pity milestone.
Initiate the Multi-Summon
Select the 10x Summon option. Watch for the specific SummonVFX; a special cutscene will trigger if you are lucky enough to pull an Unbound unit.
Evaluate Traits and Shinies
After summoning, check your inventory for any units with the "Shiny" tag or rare Traits. These units should be prioritized for upgrades and placement in your primary loadout.
Unbound units do not appear on the banner preview. They are hidden "jackpot" rewards that can appear at any time, regardless of which 5-Star unit is currently featured.
Advanced Summoning Strategy and Resource Management
For serious players, the All Star Tower Defense X alchemy summon is a game of patience. Managing your Gems is just as important as the units you deploy on the battlefield. We recommend saving your Gems for "Primal" or "Meta" units that significantly shift the power balance of Story or Infinite modes.
Summoning Best Practices:
- Only summon when you have enough Gems to hit the 100-pull pity.
- Prioritize Banner Y if you need Michishibo for high-level content.
- Always check the Official Wiki Discord for upcoming banner pings.
- Never sell 3-star units immediately; check if they are needed for evolutions.
- Keep a reserve of 5,000 Gems at all times for emergency meta shifts.
Ensure your unit inventory is not full before starting a large summoning session. If your inventory is full, you may be unable to continue summoning until you delete or evolve existing units.
The "Alchemy" part of the game often involves using these summoned units as ingredients for higher-tier evolutions. Even a 3-star unit that seems weak can be the missing piece for a 6-star powerhouse. Always consult the unit template guides before disposing of any pulls.
| Strategy Component | Recommendation |
|---|---|
| Gem Farming | Complete daily tasks and reach high waves in Infinite. |
| Banner Choice | Focus on the banner featuring the unit you lack for Story progression. |
| Pity Usage | Save your pity for banners with 5-stars that have high Hidden Potential. |
| Trait Hunting | Look for 'Godly' or 'Unique' traits to maximize damage output. |
Frequently Asked Questions
Q: What is the best way to get Gems for the All Star Tower Defense X alchemy summon?
The most consistent ways to earn Gems are by completing Story mode chapters for the first time, participating in Infinite mode to reach high wave milestones, and redeeming active codes provided by the developers.
Q: Do pity counters carry over between Banner X and Banner Y?
Yes, the pity counter is shared across the standard banners. If you perform 50 summons on Banner X and then switch to Banner Y, you will still only need 50 more summons to guarantee a 5-Star unit.
Q: What happens if I pull a 5-Star unit before reaching 100 summons?
If you are lucky enough to pull the featured 5-Star unit before hitting the 100-summon mark, your pity counter will reset back to zero.
Q: Can I get Unbound units from both banners?
Yes, Unbound units like Spider Boss or Michishibo can technically be obtained from either banner, although the specific Unbound unit featured in the cutscene may vary depending on the active pool.