Sub EVENT_GAIN_EXP

[Shendare]

Aha. Looks like you could do a level con check in EVENT_KILLED_MERIT (which fires for each player who got credit for the kill), to see if the npc was grey to them or not.

It looks like what you'd check is $npc->GetLevelCon($client->GetLevel())

Here's a dump of the possible con values from common.h:

#define CON_GREEN		2
#define CON_LIGHTBLUE	18
#define CON_BLUE		4
#define CON_WHITE		20
#define CON_YELLOW		15
#define CON_RED			13

I don't see an entry for grey. Might take some experimenting!