Aspects-Celestia-Compat/bin/main/data/aspects/powers/heavy_as_stone.json

{
    "type": "origins:attribute",
    "modifier": {
        "attribute": "minecraft:generic.movement_speed",
        "value": -0.0002,
        "operation": "addition"
    },
    "name":"Heavy As Stone",
    "description":"Though you may be sturdy and resistant, you are a little bit slower than other aspects."
}