How to Complete Wish Upon A Star

The objective is to defeat Entz, the Alchemist. The other enemies are a Ghoul, some Great Tortoises, and some Zombies. However, you only need to defeat Entz to complete the quest.

The undead enemies will turn into graves when they reach 0 HP, and those graves will turn back into the enemies after a few turns, but you can permanently remove the graves with moves like Burial, Exorcise, and Sanctify.