Aura perception manipulation

—And then she felt something.
Just as the Spuit Lance was about to destroy the item, she felt something on
her spine. That was clearly hostility.
Someone hostile had appeared beside Shalltear, so obviously that she could
not ignore it.
Shalltear averted her eyes from Ainz to see who that enemy was.
And then — she found that there was nobody there.
Ainz’s spell had created a two-hundred-meter-wide expanse of desert.
Nobody else was there beside Shalltear and Ainz. The hostility she had felt just
now was nowhere to be found, as though she had been daydreaming—

- Vol 3; Chapter 5