From TFCWiki - The Final Challenge MUD's Player Information Resource
Become that which is unseen.
See also HELP VISIBLE.
- Can be cast on others and allows the player to disappear from view. Only players and mobs with true seeing or Detect Invis can see through this spell. This is useful for navigating past aggressive mobs or for sneaking up on PK targets. At level 30 mage this spell costs 5 mana. Ink 21:58, 24 May 2012 (MST)