When Elemental Drain is applied by someone else EVENT_COMBAT_EVENT is not firing whenever magicka is returned via the Minor Magickasteal effect. When Elemental Drain is applied by oneself however, an event with result = ACTION_RESULT_POWER_ENERGIZE is fired as expected and known for other magicka returns.
It is even fired when other players get Magicka from your elemental drain.
I think the behaviour should be that when a player receveis magicka, the event should fire.
This is related to this thread that ZOS_GinaBruno already commented in:
https://forums.elderscrollsonline.co...omment_4369753