Element

Category:Terminology
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Each element has a weakness and a strength. 
 → → → → → → 
Additionally ← → are opposed elements.
Or, if you like lists:
: melts 
: blocks 
: erodes 
: grounds 
: shocks 
: douses 
: illuminates 
: eclipses 
Certain weapon skills have elemental properties, as well.
Ex: Red Lotus Blade > Fire
See also:
Weather
Ninja: Elemental Wheel
Calculating Magic Damage