Sunders was interested in Spirit Mantra. He asked Angor to keep reciting those notes while he kept a note of the condition of Angor's soul.
A moment later, Angor's soul floated to Sunders.
"Spirit Mantra is a completely different supernatural ability," Sunders said after doing multiple tests. "The 'Kirigakure' mentioned by Isabelle must be another supernatural being as powerful as wizards."
Wizards could travel through different worlds and planes freely because their strength depended on their knowledge, experience, and how much "truth" they discovered. Therefore, being in a foreign plane would not hinder their power and skills.
This test suggested that the Spirit Mantra used by "Kirigakure" was also such a power unaffected by the world's consciousness. However, there was no way for Sunders to learn anything about this skill as of now.