Before you learn the effects themselves, remember that enemies that are vulnerable to an element, take 30% damage, whilst enemies that resist an element only take 50% of the damage the trap deals.

Fire - Sets enemies on fire. Enemies who are on fire take damage over time. (You can use this to your advantage with traps such as the tar trap. It has a unique upgrade that increases fire damage taken whilst slowed)

Ice - Freezes enemies. Makes enemies brittle, taking extra damage from physical sources. Also it stops them in-place and unable to move. This effect doesn't last too long.

Stone - Not a damage type, stoned enemies, like frozen enemies, take bonus damage from physical, however not from ice. You can have a stoned AND frozen enemy for combos but the damage modifier wont be any better. Stoned enemies still take damage from DoT's.

Physical - Base type of damage.

Lightning - Electrifies enemies. Upon death, electrified enemies explode doing damage in a small radius. Some traps also stun enemies if they have been previously electrified. (Note that ceiling lasers deal lightning damage)

Arcane - Arcane damage debuffs enemy allowing them to take a flat additional amount of damage from other arcane traps. (Lets say a orc steps on arcane (unique) brimstone, after that they get hit by arcane dragon which deals 10 damage (+5 extra damage, because of the debuff.) From what is currently known, the amount is 15%.

Acid - Causes enemies to take damage over time. Debuffs orcs with "Melt" increasing physical damage taken by 50%.

Bleed - Bleeds enemies, does DoT (Damage over Time). Adds combo multiplier.

Airborne/Knocked down - Take 100% (2x) more damage from all sources.

This info is accurate and has been tested as of: 16th August | 2021
If you suggest any changes, make sure to provide some kind of credible evidence or proof of it. Random opinions won't get added.


Edit changelog:
8/8/2021 - Added "Melt" debuff info to "Acid" section. Thanks to: https://steamproxy.com/id/Pentism

16/8/2021 - Added info about vulnerabilities/resistances. Added "Bleed" effect info. Added "Airborne/Knocked down" state info. Updated "Stoned" effect info.
Thanks to: https://steamproxy.com/id/glueistasty , https://steamproxy.com/id/MinoruLeonardo , https://steamproxy.com/profiles/76561198008994825

21/4/2022 - Added info that we now fully know the % of damage increase with the arcane debuff. Thanks to: https://steamproxy.com/profiles/76561198060056782