Simply known as the "Legendary Cards" in my short story, Oracle Arrivals: The Trading Card Game, I tried to create these similar to some simple Chinese illustrations I've seen. And no, I didn't upload this to purposely throw off the interpretations of those who have entered my story cover contest.
Listed from left to right, top to bottom:
*TrisonaElai: Known as the Elandruler, TrisonaElai is the embodiment of a storm. TrisonaElai appears to be a yellow feline-like humanoid with glowing stripes that is sometimes depicted riding a cloud. He has power over thunder, lightning, and wind. His name comes from "electricity" and "oni", the Japanese word for ogre. TrisonaElai may be based on a Japanese oni god of storms, Raijin.
*AuriQua: Known as the Qualandruler, AuriQua embodies the element of water. AuriQua appears to be a type of blue-skinned merman with a diamond-shaped head. He has power over water, ice, and marine life. His name comes from "aqua", the Latin word for water. AuriQua may be based on the Greek god, Poseidon.
*KaizonioVol: Known as the Volandruler, KaizonioVol embodies the element of fire. KaizonioVol appears to be a magma-bodied humanoid with a flame-shaped head. He has power over fire, magma/lava, and the passion of warriors. His name comes from "volcano" and "kaiser", the German word for emperor. KaizonioVol may be based on Vulcan, the Roman god of volcanoes and craftmanshift.
*EstForor: Known as the Forlandruler, EstForor is the embodiment of a forest. EstForor appears to be a green alien-like humanoid with long hair and elf-like ears and is sometimes depicted as being part-tree. He has power over plant-life, soil, and has the ability to predict the future by reading the stars. His name comes from "forest". EstForor may be based on the Green Man, a forest sprite, or an elf.