1-If the deceivers are behind the thief of the map pieces in « Toys in the attic » they already know where they are hidden, right ? So why the deceivers need to realise a ritual in « that which was lost » to determine where the map pieces are hidden ? it’s a nonsense, isn’t it ?
2-if the deceivers try to not reveal their true nature, asking some mantis eggs to the PC (which is fun for the game but very suspicious otherwise) to prepare an omelets is not very smart ?