Marvel Comics introdues Thor and Loki's terrifying brother Ullr, the God of Doom in The Immortal Thor #11. The God of Doom is also known as Ullr the Wanderer, meaning he knew where Tyr disappeared to, making him integral to the success of the Children of Odin's mission. Ullr, despite his terror-inducing reputation, plays a crucial role in the Marvel Universe by leading Thor, Loki, and the other Children of Odin to Tyr.

Warning: Contains Spoilers for The Immortal Thor #11! Marvel Comics fans are fairly familiar with Thor and Lokis many siblings, as theyve been popping up here and there in Thor comics for the last few decades. But, for those that arent, Thors latest comic series gave fans a nice refresher, as Thor has called all his siblings to Asgard for an important mission. Well, except one, who actually showed up to this gathering uninvited by Thor, marking his official Marvel Comics debut.