What can be used to measure a true hero?

Well, there may be different options here, though it's widely believed that this one is the most important. This pantheon represents the highest level heroes of Godville.

Heroes are ranked by the amount of experience they have gained and therefore, by their level.

This pantheon is difficult to rise up in. In general, when a hero increases their level, so do other heroes and therefore the heroes that were created the earliest tend to stay at the top of this pantheon.

New heroes are born all the time though, so an increase of rank here cannot be ruled out.