private fun onEntityCombat(event: EntityDamageByEntityEvent) {
        val damager = event.damager
        val attacker = if (damager is Player) damager else {
            if (damager is Projectile && damager.shooter is Player) damager.shooter as Player
            else return
        }
        val victim = event.entity
        if (victim !is Player) return
        val pvpEvent = PlayerPVPEvent(attacker, victim, event.cause, event.damage)
        Events.fireEvent(pvpEvent)
        if (pvpEvent.isCancelled) return
        victim.lastDamageCause = pvpEvent
    }

    private fun onPlayerPVP(event: PlayerPVPEvent) {
        val attacker = event.damager
        if (!enabled.contains(attacker)) {
            messageHandler.sendMessage(attacker, "PVP.ATTACKER_DISABLED")
            event.isCancelled = true
            return
        }
        val victim = event.entity
        if (!enabled.contains(victim)) {
            messageHandler.sendMessage(attacker, "PVP.VICTIM_DISABLED")
            event.isCancelled = true
            return
        }
    }

    private fun onGraveCreate(event: GraveCreateEvent) {
        if (event.player.lastDamageCause !is PlayerPVPEvent) return
        event.isCancelled = true
    }