Possibly he does want himself some of that, if it does what he thinks it does and what his liege promised him it would do.
"I thiiiiiiiink there might have been a case that was like four months, but only because the Summoned Hero was a crazy person who lived in a dungeon until he got the job done. I don't recommend it because you might die."
"8,000 miles diameter. It was spotted five years and three months ago, and from its width and rate of growth it's thought to have started almost immediately before being spotted. It crosses oceans. Sufficiently rich people can get evacuated to continents further north, and other people have tried to flee on foot, hoping the Summoned Hero turns up before then, before they get burned to death on the edge of their continent once all the ships are gone. There is a continent being consumed even now; I think it's projected to last another year."
"Please don't rush. Maybe you or another Hero can put the land masses back afterwards and I think it's very bad if you go too fast and die. We've got some other continents left."