Universal Tower Defense X Relics Selection Guide: Best Sets & Builds (2026)

Why Relics Matter in Universal Tower Defense X

Relics are the backbone of any powerful loadout in Universal Tower Defense X. They aren't just minor stat boosts — they fundamentally change how your units perform, enabling you to shred through the toughest raid bosses and clear waves with ease. Choosing the right relic setup can mean the difference between a smooth victory and a frustrating defeat. This universal tower defense x relics selection guide will walk you through everything you need to know, from basic rarity to advanced tag synergies.

Whether you are a new player just starting to farm your first Epic relics or a veteran hunting for perfect 3-star Raid pieces, understanding the system is crucial. The game offers a deep and rewarding customization system, and we are here to break it all down for you. By the end of this guide, you will know exactly which relics to target for your favorite units and why.

Understanding the Basics: Rarity, Types, and Stats

Before diving into specific sets, you need to understand the core mechanics. Every relic in Universal Tower Defense X has a rarity, a type (Top, Bottom, or Accessory), a main stat, and potential substats.

Relic Rarities

Higher rarity relics are strictly better. They can be leveled higher and come with more substats, making them far more powerful in the endgame.

Relic Types and Their Main Stats

Each relic slot provides a different primary bonus. You must equip a Top and Bottom relic from the same family to activate the set bonus. Adding the Accessory unlocks an even more powerful effect.

Substats: The Grind for Perfection

Substats are randomly rolled and can be upgraded as you level the relic. All three relic types share the same pool of possible substats, which includes Damage, Cooldown, Range, Crit Rate, Crit Damage, DoT Damage, Buff Potency, and Effect Resistance. For most damage-dealing units, you will want to prioritize Damage, Crit Rate, and Crit Damage. For support or debuff units, Cooldown and Buff Potency become much more valuable.

The Best Universal Tower Defense X Relic Sets for 2026

This is the core of your universal tower defense x relics selection guide. Not all sets are created equal. Some are fantastic general-purpose options, while others are incredibly powerful but only on specific units. Here are the top contenders you should be farming for.

Top-Tier Offensive Sets

These sets provide massive damage boosts and are excellent for your primary damage dealers.

Berserk Shinigami Set

This is arguably one of the best raw-damage sets in the game.

• Top + Bottom Set Bonus: +10% Dark, Fire, Rose, and Light Damage.
• Accessory Set Bonus: Every 5 hits, the next attack deals an extra 20% True Damage that ignores all resistances.

This set is incredible because it provides both broad elemental coverage and a powerful, unresistable damage spike. It is a top recommendation for any unit that attacks quickly.

Super Roku Set

A phenomenal set, especially if you can build around its unique condition.

• Full Set Bonus: +10% Damage, +15% Crit Chance, and a massive +20% Damage if the unit is placed within range of a Saiyan unit.
• Accessory Set Bonus: A 5% chance to stun enemies on attack.

The condition is easy to meet in most team compositions, making this a fantastic generalist set. The added stun chance is a very nice bonus for crowd control.

Bio-Android Set

This set offers a well-rounded boost to all offensive stats.

• Full Set Bonus: +10% Damage, +5% Range, -5% SPA (attack cooldown), +5% Crit Rate, +15% Crit Damage.
• Accessory Set Bonus: Deal +10% Damage to enemies under 50% HP.

The -5% SPA is a huge deal, effectively increasing your unit's attack speed. The execute damage on low-health enemies helps secure kills and prevents leaks.

Specialized and Synergy Sets

These sets are less general but can be game-changing on the right unit.

Biju Set

Perfect for units that rely on a powerful meter-based ability.

• Top + Bottom Set Bonus: +10% Damage, +20% Meter Gain.
• Accessory Set Bonus: When a meter bar is used, increase damage by 70% for 10 seconds. Does not stack.

The +20% Meter Gain helps you reach your ultimate ability faster, and the 70% damage burst after using it is enormous. This set is a must-have for any "transformation" or "ultimate attack" unit.

Ex Captain Set

An excellent economic and crit-focused set.

• Top + Bottom Set Bonus: +10% Crit Rate, +25% Crit Damage.
• Accessory Set Bonus: Refunds 5% of yen spent on upgrades.

This set is fantastic for crit-based units. The 5% yen refund is also a great long-term benefit, saving you thousands of yen over the course of a long game.

Rebellious Shinobi Set

This set has incredible potential for units that can apply crowd control or swap forms.

• Top + Bottom Set Bonus: When the unit applies any crowd control effect, gain 30% extra damage for 10 seconds.
• Accessory Set Bonus: When the unit swaps form or mode, permanently increase that placed unit's damage by 5%. This can stack up to 6 times.

If you have a unit that can stun, slow, or freeze, the 30% damage buff is almost always active. For form-swapping units, the permanent stacking 30% damage bonus (5% x 6) is a massive power spike over time.

Mastering Raid Relics and Tag Bonuses

Raid relics are the true endgame of the universal tower defense x relics selection guide. They are the only relics that can roll with stars and tag bonuses, making them significantly more powerful than Mythic relics.

The Star System

When you obtain a Raid relic, it will have 1, 2, or 3 stars. The number of stars determines how much better the relic's base stats are compared to a Mythic relic.

As you can see, 3-star Raid relics are incredibly rare but provide a massive advantage.

Tag Bonuses: The Key to Ultimate Power

The true power of Raid relics comes from their tags. A Raid relic can roll with a specific tag (e.g., Peroxide, Reaper, Rage, Hollow). If you equip that relic on a unit that shares the same tag, the unit receives an additional, powerful set of buffs.

For example, the Reaper Relic Set has different tag perks:

• Peroxide Tag: +10% Damage, +5% Buff Potency, +8.5% Crit Damage.
• Reaper Tag: +20% Hyper Armor Damage, +12.5% Armor Penetration, +15% Range.
• Rage Tag: +25% Crit Damage, +10% Crit Rate, +10% Range.
• Hollow Tag: +12.5% Damage, -7.5% Cooldown, +15% Range.

This means you are not just farming for a specific set; you are farming for a specific set with the correct tag for your best unit. This is where the deepest level of strategy lies in your universal tower defense x relics selection guide.

How to Choose the Right Relics for Your Units

With so many options, how do you decide? Here is a simple decision-making process:

1. Identify Your Unit's Role: Is it a main DPS, a crowd controller, a support buffer, or a boss killer? A unit like "Jinoo, Shadow Monarch" will want different stats than a pure support unit.
2. Check for Set Synergies: Does your unit apply crowd control? Look at Rebellious Shinobi. Does it rely on a meter? Go for Biju. Is it a fast attacker? Berserk Shinigami is a great choice.
3. Prioritize Tag Bonuses: Once you are in the endgame, the correct tag on a Raid relic will dictate your choice. A 2-star Raid relic with a perfect tag is often better than a 3-star relic with a useless tag.
4. Focus on Substats: A perfect set with bad substats is weaker than a good set with perfect substats. Grind for Damage, Crit Rate, and Crit Damage on your DPS units. Focus on Cooldown and Buff Potency for supports.

Frequently Asked Questions (FAQ)

Q: What is the best relic set for beginners in Universal Tower Defense X?

A: For beginners, the Ex Captain set is a fantastic choice. It provides a solid boost to Crit Rate and Crit Damage, which works on almost any damage dealer. The 5% yen refund on the accessory also helps you afford more upgrades early on, making your early game much smoother. This is a great starting point for your universal tower defense x relics selection guide journey.

Q: Are Raid relics always better than Mythic relics?

A: Not automatically. A 1-star Raid relic has the same base stats as a Mythic relic. However, Raid relics have the potential to roll with 2 or 3 stars, which makes them strictly better. More importantly, Raid relics can have tag bonuses. A 1-star Raid relic with a perfect tag for your best unit is almost always superior to a Mythic relic.

Q: What substats should I look for on my main damage dealer?

A: For the vast majority of damage-dealing units, you want to prioritize Damage, Crit Rate, and Crit Damage. These three stats directly multiply your unit's damage output. Cooldown is also valuable, but for pure DPS, the crit stats are king. DoT Damage is only useful if your unit applies damage-over-time effects.

Q: How do I get 3-star Raid relics in Universal Tower Defense X?

A: 3-star Raid relics are the rarest items in the game, with only a 5% chance to drop from Raid content. Your best strategy is to consistently farm the highest-difficulty raids you can handle. There is no other way to guarantee them — it is a pure test of patience and persistence. Good luck with your relic hunt