public boolean isMonsterBuff() {
        switch (sourceid) {
            case 1211013: // Threaten
            case 1201006: // threaten
            case 2101003: // fp slow
            case 2201003: // il slow
            case 5011002:
            case 12101001: // cygnus slow
            case 2211004: // il seal
            case 2111004: // fp seal
            case 12111002: // cygnus seal
            case 2311005: // doom
            case 4111003: // shadow web
            case 14111001: // cygnus web
            case 4121004: // Ninja ambush
            case 4221004: // Ninja ambush
            case 22151001:
            case 22121000:
            case 22161002:
            case 4321002:
            case 4341003:
            case 90001002:
            case 90001003:
            case 90001004:
            case 90001005:
            case 90001006:
            case 1111007:
            case 51111005: //Mihile's magic crash
            case 1211009:
            case 1311007:
            case 35111005:
            case 32120000:
            case 32120001:
                return skill;
        }
        return false;
    }