Loot tables example.

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "item",
                    "weight": 1,
                    "name": "minecraft:wooden_sword"
                },
                {
                    "type": "item",
                    "weight": 1,
                    "name": "minecraft:stone_sword",
                    "functions": [
                        {
                            "function": "set_count",
                            "count": {
                                "min": 1,
                                "max": 10
                            }
                        }
                    ]
                },
                {
                    "type": "item",
                    "weight": 1,
                    "name": "minecraft:iron_sword",
                    "functions": [
                        {
                            "function": "set_attributes",
                            "modifiers": [
                                {
                                    "name": "null",
                                    "attribute": "generic.maxHealth",
                                    "operation": "addition",
                                    "amount": {
                                        "min": 2,
                                        "max": 10
                                    },
                                    "slot": [
                                        "mainhand",
                                        "offhand"
                                    ]
                                }
                            ]
                        }
                    ]
                },
                {
                    "type": "item",
                    "weight": 1,
                    "name": "minecraft:golden_sword",
                    "functions": [
                        {
                            "function": "enchant_randomly",
                            "enchantments": [
                                "sharpness"
                            ]
                        }
                    ]
                },
                {
                    "type": "item",
                    "weight": 1,
                    "name": "minecraft:diamond_sword",
                    "functions": [
                        {
                            "function": "set_nbt",
                            "tag": "{display:{Name:\"Mighty Sword\",Lore:[...by Jragon's Might.]}}"
                        }
                    ]
                }
            ]
        }
    ]
}