hey
Currently, I work on a plugin to do a thing like that
templevel plugin
for temporarily change the level of a player ( a few days, a few hours or a few minutes )
command
!tlevel [player's name or id]
for know if the player has a temporary level
!tlevel [player's name or id] [group or level],[duration]
for put a temporary level to player
example:
!tlevel player admin, 2h (for the admin level for 2 hours)
or
!tlevel player 20, 15m (for the moderator level for 15 minutes)
or
!tlevel player fulladmin, 3d (for the fulladmin level for 3 days)
!tlevel [player's name or id] [-u]
for delete the temporary level and remit its original level to player
this plugin for test only (first version, possible few bugs)
download ->
templevel v1.0.0Sorry for my English