The Undead Boss started getting anxious as he saw the Puppet Maker charging at him; after all, magical beings weren't really good at physical combat. Despite the Puppet Maker also not being a melee-type Boss, undoubtedly, with her abilities, if she managed to get close to him, he would be in real danger.
Even though the situation was unfavorable for him, the Undead Boss didn't flee like his minions. He was crystal clear that, given the strength and abilities of the Puppet Maker, if he faced her head-on in combat, although not certain of victory, he was not without hope. But if he were to take off in an attempt to escape, he would most likely have zero chances of surviving.
As a result, when the Puppet Maker attacked it, the Undead Boss remained where it was, nevertheless, he calmly sent all the magic spells that he knew her way.