How to Get Free Aqua Unit ASTD X Guide All Star Tower Defense X

If you’ve been grinding ASTD X and looking for a way to farm gems, trait rerolls, and even get your hands on the exclusive Aqua unit, this guide will show you everything you need to know. With a little effort and smart planning, you can unlock tons of rewards — completely for free. Check out our ASTD X Codes & ASTD X tier list for new players in the game.

Where to Start: The Blue Temple

To access the free Aqua dungeon, the first step is to find the blue temple. This building stands behind the Gold Shop, and it’s hard to miss once you spawn in. Head behind the shop and you’ll see a structure with tall pillars — that’s the place you’re looking for.

However, you can’t just walk in immediately. There’s a requirement:

• You must complete all story modes from Story 1 to Story 4, especially the Naruto story arc.

Once that’s done, the temple door will open, and you’ll gain access to the dungeon countdown area.

How the Dungeon Works (Free Aqua Drop Chance)

Once inside the temple, you’ll notice a countdown timer. This timer controls when the dungeon opens — which happens every 4 hours. The dungeon stays open for 30 minutes, and during this time, you can complete as many runs as possible.

Here’s what you can get inside the dungeon:

• 100 Gems per stage clear
• 200 Gems per clear if you’re the MVP of a full squad
• Chance to drop the Exclusive Aqua Unit
• Trait rerolls, stat rerolls, gold, and more

You can realistically farm 1,000–2,000+ gems in a single dungeon session if you’re fast and efficient.

Best Strategy to Maximize Rewards

To make the most out of each dungeon session, keep the following tips in mind:

1. Use Orange-Element Units All the enemies inside the dungeon are purple-typed. That means orange-element units deal 100% bonus damage to them. Equip your best orange DPS units to ensure fast clears and boost your MVP chances.
2. Join a Full Squad Being in a full team not only helps you clear faster but also increases the gem rewards if you become MVP.
3. Watch for the Timer The in-game system doesn’t tell you when the next dungeon is starting. The best way to keep track is by using banner streams that include a built-in dungeon timer.
4. Grind Smart Aim to clear 10 runs within the 30-minute window. If done right, that’s a solid 2,000 gems + Aqua unit chances.

The Aqua unit is time-limited. According to recent developer info, this unit will be removed in the next update, making it truly exclusive. If you don’t grab it now, you might miss out forever. This dungeon isn’t just good — it’s essential if you want to climb quickly in ASTD X. With high gem yields, traits, and exclusive rewards, it’s easily one of the best features in the game right now. Start grinding, team up with friends, and don’t forget to bring your orange units. Good luck getting that Aqua drop!