Quote from Whyrainfalls;222818:
Saying they add elemental protection makes sense, but it doesn't explain natural magic shield, since there's no such thing as natural protection.
I think Natural Magic Shield is just a version of Defense for ranged. The only difference is that it can't be cancelled until time runs out and it negates any stun taken. It still adds prot and defense as long as you're no being hit from within the shield.
I should mention another reason why I think the elemental Magic Shields give elemental protection: Alchemy. Alchemy is elemental, with Earth being the "natural" element on the wheel. "Natural", I think, is just damage without any given elemental damage bonus. Anywho. Water Cannon is ice elemantal, Ice Magic Shield will work on it. Flame Blast is fire elemental, Fire Magic Shield will work if said Blaster is far enough away.
I am working on finding this stuff out, I think I'm one of the few people who actually rank them. These are just theories though, I'm not saying that this is exactly what they are.