Originally Posted by
Edyth
I know Monstrosity is "pointless" in terms of improving your character, but the point is that it's fun to play as and unlock monsters, and that experience is more fulfilling than throwing away 20 merit points to wipe in a battlefield or losing in Delve due to one person's minor mistake.
Monstrosity is just plain enjoyable, and the feeling of unlocking a new monster is honestly often more rewarding than getting a few more points added to a stat with a hard-earned piece of gear that's outdated after the next update.