Traits, and knowing when to stop rerolling
Traits are modifiers that roll onto a unit. You change them with Trait Rerolls, which are a separate token stock from the stat and relic side. Running out of one does not block the other.
There is no mechanical difficulty here. The system is a slot machine with a button, and the entire skill is knowing when to walk away from it. This page is mostly about that, plus an honest note on why we are not printing a trait table we have not verified.
Traits in one paragraph
Because that is genuinely all the mechanic is.
A trait is a modifier that sits on a unit. It arrives by roll. You can replace it by rerolling, which costs a Trait Reroll token. That is the system. There is no deterministic path, no crafting, and no targeted selection that we have been able to confirm.
Everything that makes traits interesting is therefore economic rather than mechanical. The question is never "how does this work", it is "how many tokens am I willing to feed this before I admit the roll is fine".
Trait Rerolls are their own token
Separate stock from the stat side, and that is more useful than it sounds.
The reroll economy has at least two currencies: Trait Rerolls for the trait side, and Stat Rerolls, sometimes written as Relic Rerolls, for the stat and relic side. They do not share a pool.
The practical consequence is that emptying one stock does not stall your account. If you have burned every trait token on a unit, you can still work the relic side of the same unit, or of a different one. Players who assume a single shared currency tend to stop playing with the systems entirely once they hit zero on one of them, which is a self-inflicted wall.
It also means the two systems compete for your attention but not for your resources, so the "which first" question is about time and focus, not budget. More on that below.
A stopping rule you can follow
Set it before you open the panel, not while you are in it.
Rerolling is designed to be frictionless. The button is right there, the animation is quick, and there is always one more roll. Nothing in the game will tell you that you have spent forty tokens on a unit you are going to bench. So decide in advance.
- Name the budget out loud. "Ten tokens on this unit, then I stop." If you cannot say a number, you are not rerolling with a plan, you are pulling a lever.
- Only reroll a unit that is in your six. Not a unit you might field. Not a unit a tier list likes. A unit that is on your board right now and stays there when you are not thinking about it.
- Accept the adequate roll. Chasing perfection on one good unit is worth less than an adequate roll on the five others you actually play, because those five are on the board every run.
- Stop entirely when a banner is close. Tokens keep. Your roster is about to change. Rolling right before your team shifts is how tokens vanish with nothing to show.
The trait table we will not print
Every other guide has one. Ask them where it came from.
Not verified yet. We have not seen a trait list for Universal Tower Defense Z that traces back to the game rather than to another guide. We do not have the trait names, the roll weights, or the effect magnitudes. Publishing a ranked trait table on that basis would be fabrication, and it would be the most-read fabrication on this site, because it is exactly what people search for.
What we will do instead is log the traits we see as we roll them, on units we actually own, and publish that with the sample size attached. A short list with a number next to it beats a long list with nothing behind it.
Traits or relics first
They do not compete for currency, so this is a focus question.
Since the two token stocks are separate, there is no budget trade-off between them. What there is, is an attention trade-off, and the answer follows the same logic as the rest of the upgrade stack: do the cheap reversible thing before the expensive permanent one.
Both reroll systems are cheap and repeatable. Neither is permanent the way an Etherealize is. So the real ordering advice is not "traits before relics", it is both of them after levelling and before shards. If you are rerolling a unit you have not levelled, the order is already wrong regardless of which token you picked up first. The relics page covers the stat side in its own right.
Last updated 2026-07-14 · Trait mechanics re-checked against Update 4.0