NaturesAura/src/generated/resources/data/naturesaura/loot_tables/blocks/ancient_slab.json

{
    "type": "minecraft:block",
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "minecraft:item",
                    "functions": [
                        {
                            "function": "minecraft:set_count",
                            "conditions": [
                                {
                                    "condition": "minecraft:block_state_property",
                                    "block": "naturesaura:ancient_slab",
                                    "properties": {
                                        "type": "double"
                                    }
                                }
                            ],
                            "count": 2
                        },
                        {
                            "function": "minecraft:explosion_decay"
                        }
                    ],
                    "name": "naturesaura:ancient_slab"
                }
            ]
        }
    ]
}