This is EffectSteal:
Each time a player kills another player the killer is awarded a good effect, and the victim receives a bad one as punishment
Every other change of the effects of the players is disabled for this minigame.
You can modify (dev-feature) the current effects of the players with the /es command
es Command:
/es reset - reset all player's effects
/es remove <name> - demote a players "value" by 1
/es add <name> - promotes a players "value" by 1
Known Issues:
It may happen that the game tries to remove a level 2 (or higher) effect from a player but instead removes all effects of this type - Working on it...
On every reload/restart the game will reset all player's effects - intended behavior (minigame)
Full Changelog: 0.3-alpha...1.0-release