The world of Adventure Xpress is controlled by the Elemental powers.
They affect both the basic combat and the spells the courier can cast.
The five Elements are:
Element Runes will interact differently with the other Elemental foes.
Fire Runes will cause extra damage to Earth foes but less to Fire ones.
Earth Runes will cause extra damage to Water enemies but have no additional effect on Dark ones.
Light Runes cause extra damage to Dark foes, as Dark Runes do to Light enemies.
Neither directly effect Earth, Air, Light or Fire.
Runes of the same Elemental nature as an enemy have a reduced effect.