Nidhogg

Nidhogg is a monstrous serpent drawn from Norse mythology, where it gnaws at the roots of Yggdrasil, the world-tree. In Marvel's cosmos, it serves as a primordial creature of darkness threatening the realms connected to Asgard.

Few corners of Marvel's mythological landscape feel as primordially menacing as Nidhogg, who first slithered into comics in the legendary Thor #340 in 1984 — conjured by none other than Walter Simonson during one of the most celebrated runs in the Thunder God's history. Drawing on Norse myth's great serpent of the world-tree, this creature has haunted the pages of Thor and Avengers across nearly four decades, a testament to how deeply Simonson's Bronze Age vision took root. With two key collector issues to its name and a rogues' gallery of page-mates that includes Thor, Loki, Sif, and even Victor Von Doom, Nidhogg occupies rare, shadowy company in the Marvel cosmos. For fans who love their mythology dark and their comics steeped in genuine legendary weight, this is a figure absolutely worth seeking out.