Loot table test: EnderDragon Skull

{
    "pools": [
        {
            "rolls": 1,
            "items": [
                {
                    "item": "minecraft:skull",
                    "weight": 1,
                    "functions": [
                        {
                            "function": "set_data",
                            "data": 5
                        }
                    ]
                }
            ]
        }
    ]
}