Quote Originally Posted by Roto13 View Post
What's the reward for beating it? Because I like elixirs.
You can steal the Elixir back during the fight.

Quote Originally Posted by 10-Breaker View Post
It is so far in the game that you should have finished the licenses you need for each character. So don't bother up wasting elixirs.
The only reason I'd fight them is to complete the Bestiary.