Every Unit and Enemy possesses an element by default and each element has a weakness and resistance
Elemental Weakness
Units that fight against Enemies with the weak element receive a 3x increase in damage. This bonus damage can be further increased by passive skill nodes that increase Elemental Weakness. (DoTs Included)
Fire (Red) is the counter to Nature (Green)
Water (Blue) is the counter to Fire (Red)
Nature (Green) is the counter to Water (Blue)
Dark (Purple) is the counter to Light (Yellow)
Light (Yellow) is the counter to Dark (Purple)
Perfect Seal (Scarlet) is the counter for all elements.
Elemental Resistance
Units that fight against Enemies with the strong element (NOT Light, Dark and Perfect Seal) Deals 0.33x of dmg