Thor: Ragnaroks #1

After a busy day of fighting the Absorbing Man as Thor and tending to patients as Donald Blake, Thor has a disturbing dream that causes him to awaken and head immediately for Asgard. There he finds Odin presiding over the Althing, where the Warriors Three are accused of murder by the giant Gnives. The Warriors went fishing and killed a giant sea beast who turned out to be Gnives' idiot son in disguise. In retribution, Gnives demands that five impossible feats be accomplished, with failure meaning death for the Warriors. Thor and the Warriors accept the challenge.