[Stigma of Darkness successfully absorbs Death Mana.]
[...]
As I continued to kill Golems on the way to the Nest of Darkness, messages like that kept popping up that I couldn't block. I just ignored it at first, but then I started thinking about trying something.
I thought the amount of Death Mana inside the Stigma of Darkness was sufficiently filled. At least it was more than enough to support my control over Nya Nu.
Since I made Nya Nu my slave, I had never used the Mind's Puppet skill again.
I had the thought of using my skill on Claude. Maybe, if my skill worked, Claude would teach me the skills he had before.
I remember when I successfully made Nya Nu my slave using the Mind's Puppet skill, I received a notification from the World System.
A notification telling me that there was a limitation, either on myself or on the Mind's Puppet skill itself, which made me unable to use the Mind's Puppet skill on targets other than Nya Nu.