My last deaths, very much in the plural: I discovered that, just because a side-quest is
available at level 13, and just because a dungeon's normal mobs are easily
defeated at level 13, does not mean that
either of those challenges can be
completed at level 13. Four levels later, I
still struggled to complete them. And that was after completing a pretty massive chunk of the story before backtracking.
Darksiders II. Specifically, killing Ghorn and the Deposed King. The latter is particularly egregious, since the normal mobs in his dungeon are rated at level 13, so I had every reason to believe the boss fight would be possible. Grr...