Add the following three subrules to the rule Items, with the indicated titles:

Limpet

If this item is Blessed then its holder may select another item that they hold and transfer it to another Explorer, and then destroy this Limpet.

If this item is Cursed then its holder may not drop any other item, regardless of whether or not they would otherwise be able to.

Tricycle

If this item is Blessed then, once per turn, its holder may ask the Narrator to disclose any Ploys they have received from any Explorer that turn, and the Narrator must truthfully respond.

If this item is Cursed then its holder may not submit Ploys.

Ocarina

If this item is Blessed then, any time its holder would lose Sanity, they instead do not.

If this item is Cursed then all Sanity loss incurred by the holder is doubled.

Add the following to the end of the rule Items:

An Explorer who is Possessed by Katastrophe treated Cursed items as if they were Blessed, and vice versa.