Loki is a Norse jotunn or god, sometimes both.
He is a trickster who revels in chaos. Sometimes helpful to the Norse gods, at other times he opposes them.
A world tree is found in several mythologies, especially Indo-European, Siberian and Native American myths. These giant trees hold up the Heavens, connecting them to the Earth and, through their roots, the Underworld.
Yggdrasil, the Nordic world tree, is an ash tree.
Norns: Urder, Verdandi and Skuld.
They are comparable to the Greek Fates as they watch over and control mankind's destiny.
This is the Hindu god Ganesha, 'Remover of Obstacles' and 'Lord of Beginnings.'