Each element is strong against one and weak to another. The element with the advantage over the other will deal twice as much damage. (an A rank Fire spell would deal S rank damage to an A rank Ice spell) The same way, a defensive spell will be twice as durable than normal against an element it is strong against. (an A rank Water defense will require an SS rank or equivalent Fire spell to break it.)
Fire
Wind
Water
Lightning
Earth
Ice
Light
Darkness
Fire
- Strong against Ice
- Weak to Water
Wind
- Strong against Lightning
- Weak to Darkness
Water
- Strong against Fire
- Weak to Lightning
Lightning
- Strong against Water
- Weak to Wind
Earth
- Strong against Light
- Weak to Ice
Ice
- Strong against Earth
- Weak to Fire
Light
- Strong against Darkness
- Weak to Earth
Darkness
- Strong against Wind
- Weak to Light