@oenter
COMMAND: 
@oenter <object> = <message>
ATTRIBUTE: Oenter
Sets the message (prefixed by the player's name) that is shown to others in the location being entered when someone enters <object>. Note that the message is shown to those inside the object, not those outside.
This attribute is meaningful for players, things, and rooms, and will never be automatically triggered on exits.
Example: @oenter wormhole = enters the wormhole from normal space.