Silver Celtic Helm
A silver celtic helm lies here.
'infravision ' continuous.
'detect invis ' continuous.
'invis ' continuous.
Modifies armor class by -10 continuous.
Armor class is 10-12.
A Knight is aggie, invisible, and wields. He can detect invis, but cannot detect hidden. Start fight with area spell or go visible and let him attack.
See individual mob pages linked above for more information.