All have be done by the sacred phoenix team. If pixel art is before artwork that mean the concept was born in pixel art and then the artwork draw with it at the base, and if the artwork mention is first then the concept is born with the artwork.

flabaqua, glautilus, slugaqua :
Artwork: FlorianDX and Amras Anárion
Front : Amras Anárion
Back, OW, Icon: Dracoyan

efflutal :
Pixel art : Arnik and Amras Anárion
Concept : Arnik
Artwork : eysselia

Kineos :
Concept by arnik and artwork by eysselia

Jersand, jermoon,charboa : eysselia

bulbent, maguorn, treewise :
artwork by eysselia
pixel art MikuGoya

druichy, duchefly, larfae, chrysantle :
artwork : Amras (=anarlaurendil)
pixel art : by frillecho

boarhom, furfang
artwork : splittygjaw and eysselia
furfang : by frillecho