Traits play a massive role in Universal Tower Defense. A single good trait can turn an average unit into a carry, while bad traits can slow your progress for hours. Because rerolls are limited and expensive, learning how to AFK farm traits efficiently is one of the smartest things you can do early and mid-game.
This guide breaks down the best AFK methods to farm trait rerolls consistently, including what you need, where to farm, and how to keep it running smoothly. Also check out our Universal Tower Defense Codes & Tier List for more rewards!
Best Mode to AFK Farm Trait Rerolls
The most reliable way to AFK farm traits is through Challenge Mode, specifically:
Frozen Stronghold – Act 1 (Challenge)
This challenge stands out because of its reward pool and completion speed.
Why this mode is the best:
- Gives 200 Gems per clear
- Has a 30% chance to drop 5 Trait Rerolls
- Can drop Ragna (Secret Unit)
- Faster than most Infinite setups once optimized
With consistent clears, this mode can generate dozens of trait rerolls per day while you stay AFK.
Minimum Requirements to AFK This Challenge
This is not a beginner-friendly farm. You need a strong setup.
Required Units
- Ace (Highly Recommended)
- Preferably with Astral trait
- Evolved with solid relics and gear
Ace performs extremely well in Frozen Stronghold due to his AoE damage and burn effects, which help clear waves quickly and safely.
Recommended Ace Build for AFK Farming
Trait
- Astral (best option)
- Ruler also works if you already have it
Astral is guaranteed after 277 rerolls, which is very achievable through quests, achievements, battle pass, and codes.
Stat Points
- 70–80 points into Damage
- Remaining points into Cooldown
Gear and Relics
- Fire-damage boosting gear if available
- Cooldown or damage-focused relics
- No need for perfect rolls, just consistency
How to Set Up the AFK Macro
To AFK farm efficiently, you will need a macro tool like TinyTask.
Macro Setup Overview
- Enter Frozen Stronghold – Act 1 (Challenge).
- Record unit placement and upgrades.
- Clear the stage once manually.
- Stop recording on the victory screen.
- Enable continuous playback.
- Let the macro loop.
The macro should:
- Place Ace as early as possible
- Upgrade him consistently
- Do nothing fancy or conditional
Simple macros break less often and survive lag better.
How Many Trait Rerolls Can You Get?
On average:
- 1 clear every 4–6 minutes
- Around 8–10 clears per hour
- Roughly 2–3 reroll drops per hour
- Up to 100+ rerolls per day with long AFK sessions
This makes Frozen Stronghold the most efficient reroll farm currently available.
Is Gem Farming Better Than Trait Farming?
Not in the long run.
- Gems are easier to farm later
- Trait rerolls are always valuable
- Traits directly affect endgame performance
If you can AFK Frozen Stronghold reliably, it is always better than pure gem farming.
AFK farming traits in Universal Tower Defense is a game-changer for long-term progression. By focusing on Frozen Stronghold Act 1, building a strong Ace setup, and running a stable macro, you can stack rerolls without actively grinding. This method saves time, reduces burnout, and gives you the best chance at landing top-tier traits that matter in late game. If traits are your goal, this is the most efficient path right now.