That feature is enabled by default. You can set it in your conf\battle\monster.conf.
// Whether or not to spawn the mvp tomb.
// See http://irowiki.org/wiki/MVP#Gravestone
mvp_tomb_enabled: yes
- script MVPDeathAnnounce -1,{
OnNPCKillEvent:
if (getmonsterinfo(killedrid,MOB_MVPEXP)) {
announce getmonsterinfo(killedrid,MOB_NAME)+" has been killed by "+strcharinfo(0)+".", bc_blue|bc_all;
}
end;
}