This artifact was by far the most broken magic item Tyler had obtained from the Magic Library. However, he did not dare to use it carelessly after reading Uriel's warning at the end of the appraisal.
He hesitated to erase any aspect of himself, whether it was fear or nerves, as he didn't want his personality to be altered by any more outside forces.
Not to mention the possibility of attracting the attention of a Pre-existential being—entities above even true gods. With his luck, he was sure using this item casually would cause trouble for him, especially after what happened when he obtained the Demon King's Heritage.
However, according to Uriel, as long as he wielded the Ring of Nullity simultaneously with Ein's Band, there was a high chance even Pre-existential Entities would fail to notice him.