JGP thing 2 v2

    array <Actor> demontargets;
    bool demonMorphActive;

    override void WorldThingspawned (worldevent e) {
        if (!e.thing)
            return;

        if (e.thing.bISMONSTER || e.thing.bMISSILE || (e.thing is "PlayerPawn")) {
            demontargets.push(e.thing);

            if (demonMorphActive && !e.thing.FindInventory("PK_DemonWeapon")) {
                e.thing.GiveInventory("PK_SlowMoControl",1);
            }
        }

        if ((e.thing is "PlayerPawn") && !e.thing.FindInventory("PK_DemonMorphControl"))
            e.thing.GiveInventory("PK_DemonMorphControl",1);
    }

    override void WorldTick() {
        if (players[consoleplayer].mo.FindInventory("PK_DemonWeapon"))
            Shader.SetEnabled( players[consoleplayer], "DemonMorph", true);
        else
            Shader.SetEnabled( players[consoleplayer], "DemonMorph", false);

        bool demonMorphFound = false;
        for (int pn = 0; pn < MAXPLAYERS; pn++) {
            if (!playerInGame[pn])
                continue;

            PlayerInfo player   = players[pn];
            PlayerPawn mo       = player.mo;

            if (!player || !mo)
                continue;

            let weap = PK_DemonWeapon(mo.FindInventory("PK_DemonWeapon"));

            demonMorphFound |= (weap != null);
        }

        if (!demonMorphActive && demonMorphFound) {
            for (int i = 0; i < demontargets.Size(); i++) {
                if (demontargets[i] && !(demontargets[i].FindInventory("PK_SlowMoControl")) && !(demontargets[i].FindInventory("PK_DemonWeapon")))
                    demontargets[i].GiveInventory("PK_SlowMoControl",1);
            }

            demonMorphActive = true;
        }
        else if (demonMorphActive && !demonMorphFound) {
            for (int i = 0; i < demontargets.Size(); i++) {
                if (demontargets[i])
                    demontargets[i].TakeInventory("PK_SlowMoControl",1);
            }

            demonMorphActive = false;
        }
    }