7 Comics Characters Who Have Killed Thor

In every superhero's time, there comes a moment where they realise they have to sacrifice themselves for the good of something greater. For Thor, this comes in the form of the 'Thor Disassembled' storyline, which placed the God of Thunder in a position where he discovers that the only way to prevent the destruction of the universe is to bring about the 'cycle of Ragnarok', which requires him to destroy Yggasdril, ending his own life.

While it's ambiguous if Thor totally ceases to exist - as he states he will be in the 'sleep of Gods' waiting to be reborn - his mortal form definitely does die at the end of the 1998-2004 run, as in the third volume of the Thor comic he is brought back from the Void by the summons of Donald Blake, who is able to do so due to him being the mortal host of the lightning god for a period of time.

This means in the canon Marvel universe, Thor was essentially dead for three whole years - which creates all sorts of interesting dynamics between him and the other Avengers, not to mention a hilariously awkward storyline where he confronts Tony Stark for creating a clone of him while he was gone.