timeless

adjective [原级]永恒的；不受时间影响的；不合时宜的

Elves, goblins, and trolls seem to be the timeless creations of the distant past, but gremlins were born in the 20th century.
精灵、小妖精和侏儒似乎是远古时代永恒的产物，但小妖精诞生于20世纪。