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Fission Trait Guide

UTDX trait page for Fission: chance, rarity, effect, reroll note, and units that recommend it.

Checked May 8, 2026, 08:00 AM
MythicRarity
0.15%Roll chance
1Matching units
HighReroll priority

Trait effect

+15% Damage, -15% Cooldown, +25% Range, inflicts Radiation DoT

High-value trait. Review unit fit before rerolling.

Reroll decision

  1. Check whether the unit is a long-term carry, support, or utility pick.
  2. Compare this trait against the unit's role and tier rating.
  3. Do not chase low odds on a temporary unit just because the trait is rare.
Best traits Trait reroll guide

Best fit summary

Fission is the recommended trait for 1 unit. Compare their roles and tiers to find the best home for it.

Support: 1

When not to chase

  1. Do not chase Fission on a temporary unit just because the rarity looks strong.
  2. Do not reroll away a role-fit trait unless the target unit is already worth long-term investment.
  3. Skip heavy spending on borderline units that may not stay in your lineup.

Units recommending Fission

Units that list Fission as their recommended trait.

Prodigy Mage (Apprentice)

Mythic · Support · Hill

Support S

All traits

Return to the full trait list.

Eternal

Mythic · 0.2% · -20% Cooldown, +2% Damage per wave (50% cap), +1% Range per wave

Ruler

Mythic · 0.1% · +200% Damage, -20% Cooldown, +30% Range, 1 unit limit

Fission Trait FAQ

Short answers for effect, odds, and reroll priority.

What does Fission do in Universal Tower Defense X?

Fission is a Mythic trait with this effect: +15% Damage, -15% Cooldown, +25% Range, inflicts Radiation DoT

What is the chance for Fission?

Fission rolls at 0.15%.

Should I keep Fission?

Fission is a high-rarity trait, but it should still be kept only when it fits a long-term unit role.

Which units use Fission?

Prodigy Mage (Apprentice) currently list Fission as a recommended trait.