Purple Fire Wings!

Amera felt this slight and seemingly annoying pain, however she didn't see what Arthur saw.

The moment she puts that fabric over her back, a wave of purple fire erupts all around her back. It first appeared as a thin filament over the fabric, then it extended to form a thick layer.

Then two wings of fire were formed while Arthur could clearly see a very bright purple light coming from the lines of contact between that fabric and Amera's back.

And for a moment there he stood in hesitation, didn't know whether to warn her and make her ditch this fabric at once or… should he let her continue wearing it.

"Ouch, it hurts," On the other hand, Amera was only feeling slight discomfort at the moment. She didn't feel any threat or deadly feeling at all.

She only felt continuous needle-like pain all over her back. And that feeling didn't last for over one minute before she calmly stood like before without any pain.