[
    {
        "mob": "anomaly:anomaly_base",
        "random": 0.50,
        "when": "onjoin",
        "result": "deny"
    },
    {
        "mob": "anomaly:sound_entity",
        "when": "onjoin",
        "result": "deny"
    },
    {
        "mob": "apollyon:the_damned",
        "random": 0.25,
        "when": "onjoin",
        "result": "deny"
    }
]