I’ll elaborate
SPOILERS SPOILERS SPOILERS
so basically while he’s fighting Nico n that dude the form he uses destroys his body n core. bc u need a core to use mana he can’t use mana. but because of sylvia’s will he can use aether which is something only Asuras can use (asuras are what dragons are called) so he makes an aether core n learns to use aether..
I’ll explain the difference between aether n mana.. so
Mana is like everything around the world, the elements that make up the word. aether is the world itself.. so while u can manipulate mana u can’t manipulate aether bc u can only influence it

Some people said that art will loose his power of him being quadra elemental because of Tess. Can you tell what will be his power if he really end up loosing his quadra elemental ability? Please spoil me!!!