Njal Stormcaller

Njal Stormcaller is High Rune Priest of the Space Wolves, the Tempest That Walks, a Fenrisian seer who called an ice storm down on a Bloodthirster and has been living on that reputation ever since. Nightwing rides his shoulder. The runes do the rest.

Heimdall pulled him off a dying ship. Goreswirl named him. Nightwing was a gift for saving an Iron Priest. After the Primaris intake he followed a Thousand Sons ghost back to Prospero and dragged 13th Company survivors out of a maze Magnus still thought he owned.

Russ left. Njal stayed to make the weather take a side. Fenris has not run out of storms, and neither has he.