Two Element Systems

System 1:
Tier 1(Nature/Matter): Fire/Heat - Lightning/Plasma - Air/Gas - Water/Liquid - Earth/Solid - Ice/Cold(Not actually ice, just ice is what tends to form when you supercool the air)
Tier 2(Morality/Energy): Light/Positive - Order/Synthesis - Ballance/Statis - Chaos/Entropy - Darkness/Negative (Increasing the mind's general energy often makes it happier/more peaceful, so Dark/Light not just effect lights but energy in general)
Tier 3(Celestia/Universal): Solar/Energy(Nuclear/Electromagnetic) - Lunar/Gravity - Chronos/Time - Locale/Space
Tier 4(Essense/Metaphysical): Life/Body - Thought/Mind - Emotion/Spirit
Tier 5(Divine/Metauniversal): Creation - Destruction
Tier 6(???): Pure(Whatever the fuck you need it to do, it can do.. at the appropreate cost.
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System 2:
Main Elements: Fire <> Water | Air <> Earth | Dark <> Light
Hybrid Elements: Fire+Air = Lightning | Air+Water = Ice | Water+Earth = Acid | Earth+Fire = Explosive
Cross Elements: Fire+Water = Mind | Earth+Air = Body | Light + Dark = Spirit
Status Effects: Light+Fire = (-SpAttack) | Light+Water = (+SpDefense) | light+Air = (-Attack) | Light+Earth (+Defense)
                Dark+Fire = (+SpAttack) | Dark+Water = (-SpDefense) | Dark+Air = (+Attack) | Dark+Earth (-Defense)
Status Aliments: Lightning+Light = Haste | Ice+Light = Reflect | Acid+Light = Regain | Explosive+Light = Silenced
                 Lightning+Dark = Berserk | Ice+Dark = Slow | Acid+Dark = Poison | Exploisive+Dark = Blinded