So, if she could feel it on the ground, but not in the air, in Cara's mind that meant it was likely a trick.
And tricks of magic could be Nullified.
Cara cast [Nullify] and the air seemed to distort for a moment, which encouraged her to recruit assistance.
[Karl, help me out here. I think that we're standing on something good.] She insisted.
The Chieftain recognized the spell right away when Karl started casting. If it didn't work, then there was no harm, but if this strange adventurer could prevent a disaster from occurring near them with a Nullification spell, that would be an even larger cause for celebration.
With both Karl and Cara working, the distortions in the air began to increase, as did the mana load as they worked to overcome the spell.