I want to try to break this down and figure out Riot's logic;
You start as Light
Fire - Water = Dark Earth - Wind = Dark
Riot says these "cancel each other out so they're Dark" which doesn't really make much sense, but okay
Fire + Wind = Lightning? Fire + Earth = Lava/Magma? Earth + Water = Life/Flora? Water + Wind = Ice
Meep Man5 votesFire - Water = Dark Earth - Wind = Dark
Negative reaction leads to darkness. Dark energy is created when two types of energy conflict with each other, leading to mutual destruction.
Fire + Wind = Lightning?
Lightning is a massive amount of energy within a cloud. Fire is also energy. It seems pretty logical to me.
Fire + Earth = Lava/Magma?
That is actually what Lava/Magma is. Molten rocks.
Earth + Water = Life/Flora?
Yep, that makes sense. Put water in the earth and you get plants and life.
Water + Wind = Ice
Cold air freezes water.
BLACK REALM GOD1 votesi want to make one point. the "earth" form isnt an "earth form" it's a "nature" form. if it's anything but nature or plant then they've modeled her form wrong and they have the wrong icon. that's a leaf. her outfit is green. if it's earth it should be a rock/mountain and her outfit should be brown
BLACK REALM GOD3 votesbasically they werent creative enough to come up with sand/mist.
the combinations
1 water+fire 2 water+nature 3 water+wind
4 fire+nature 5 fire+wind 1 fire+water
5 wind+fire 6 wind+nature 3 wind+water
4 nature+fire 2 nature+water 6 nature+wind
the expected outcomes
1 lava 2 life 3 storm 4 death 5 smoke 6 sand
the elements lux actually has are from left to right
1 water 2 nature 3 wind 4 fire 5 dark (1 & 6) 6 light (base) 7 magma (4) 8 lightning (5) 9 life (2) 10 ice (3)
im pretty sure anyway. i could be wrong. anyone could be wrong when they're guessing.
BLACK REALM GOD1 votesmeh. i was close enough. life is mystic. lightning is storm
Flaherty1 votesWhat doesn't make sense? They all seem pretty reasonable
Penta Penguin3 votesMostly why would fire/water or earth/wind cancel each other, and even if they do why does it create dark?
Flaherty1 votesYou have a fire, add water to it and it goes out? Heat and destruction vs cold and peaceful, Fire and water are always seen as opposites. Hard and unmoving earth seems like the opposite of soft free flowing wind. They really should cancel out to neutral but that's not interesting so they made them become dark to add another element
Fondling Gems1 votesI prefer the idea that if you pour water on a fire then you are left with ash, so Dark Lux is just her covered in ash and soot.
BLACK REALM GOD1 votesi like to think of water+fire = liquid fire or lava. it could have also been steam depending on how you think of the combining of elements. saying that neutrals cancel each other out to make darkness would mean a few of the elements should cancel each other out. i think the real reason why they decided to go with the darkness was that it killed 2 birds with 1 stone and solved a lot of issues.
1st they didnt want to make brown lux because that would make her too similar to 
(however im reminded of 
) and they didnt like the brown colors or the personality that comes with dull tones. so earth was left out. plus the math becomes crazy with just 1 extra base element and lots of elements would end up looking very similar to their base elements which would be less appealing and hard to give personality to. secondly lots of lux fans wanted a dark or evil version of lux. third the dark skin balanced out the light skin. 4th while water+fire has a few options for an element nature+wind does not. earth+wind can be dust. nature+wind = flight or time or something crazy like that which doesnt really make much sense. however now that i know that they used a fairy skin for nature+water i think they could have made nature+air the fairy skin but then you're left with water+nature not having a combination. so to solve all the problems with the elements they basically went with magic the gathering and added air. so light water wind fire nature dark. storm ice magma are most likely elements they had already drawn so it felt natural to just say that fire+water and nature+wind = nothing or darkness and then throwing in the fairy skin as a filler to balance it out since a lot of the skins look fairy-ish.
edit*
and even more than all of that they were trying to make rainbow lux - i.e red orange yellow green blue indigo violet. like i said brown was left out and pink is a filler.
magma fire storm nature ice water dark
and then the fillers
grey - air white - light pink - mystic
thats my theory anyway. ask the developers.
GreenLore1 votesSo is it confirmed that both Water/Fire and Earth/Wind create Dark? I thought that one might turn her back into light.
Though anyway they could have done made Mist or Sand for them,but then again the skin is already kinda overkill the way it is.