Lord of the sea, host to the gods
The giant who embodies the sea itself, ruling the deep together with his wife Rán. He is both the wind and wave that sailors fear and the most generous of hosts to the gods — in a hall of glinting gold beneath the sea, he feasts the gods on his own brewed ale. It was at one of his feasts that Loki poured out abuse and insulted the assembled gods, giving rise to the famous poem "Lokasenna," the Flyting of Loki.
Ægir brewed ale in a great cauldron and set a feast in his undersea hall for the gods. When the drink had gone round, Loki burst in, exposing each god’s failings one by one, dredging up old scores and hurling foul words, until he had soured the merry feast into a grim confrontation — and only when Thor raised his hammer was he driven off. This "feast of abuse" is the most cutting group scene in Norse myth.
Below are how modern works borrow or reinterpret this name or story — not the original material. The two differ, so keep them apart.