The Stone has to mark a Stress to make standard attacks. On a successful hit, instead of marking HP the target has to mark 1d4 Stress and they must move towards the Stone as they feel the urge to pick it up.

If a target touches the Stone or marks an HP due to an attack by it, the Stone attaches to their body and they become Corrupted, clearing all marked Stress and gaining a bonus of +1 to their Evasion and Proficiency. While Corrupted, rage fills their mind and they must seek violence. They can be spotlighted by the GM like adversaries. Each time they take the spotlight, they must mark a Stress. When they mark their last HP or Stress slot, they lose the Corrupted condition. Only one target at a time can be corrupted by the Stone.

When the Stone marks their last HP, they first burst open, billowing umbral mist before collapsing in on itself in a singularity, drawing in everything around them. All targets in Close range must succeed on a Strength or Agility Reaction Roll (18) or gain a Scar as they are squashed together with the imploding Stone. If the Stone marks its last HP while attached to a creature, the creature has to make the Risk it All death move.

Spend 3 Fear to cause nightmarish visions. All creatures in Far range have to succeed on a Presence or Instinct Reaction Roll (18) or mark 1d4 Stress as they are haunted by their own fears.

When the Stone takes Major or higher damage, the causing PC loses a Hope as they feel their resolve vanishing. If they cannot lose a Hope, they must mark 2 Stress and you gain a Fear.