The Mind Trap Stone (also called the Mindtrap Talisman) is a blue rhombus-shaped stone of great power with the crest of the Dark Kingdom in the middle, with which Cassandra can utilize the complete control the minds of those who have sworn complete allegiance to her and the Opal.
It is kept at the Spire Vault for centuries until Cassandra and Zhan Tiri came to obtain it.
- Race to the Spire (first appearance and use)
- Once a Handmaiden...
- Plus est en Vous (final appearance)
- It is the third mystical object to be revealed within the Spire Vault, as was the Demantius Scroll and Shapeshifting Cloak
About the Mind-Trap Stone
- "You mean the Mind-Trap, the one that gives total control of those who swore loyalty to the Moonstone, like the Brotherhood?"
- "Cassandra, the Brotherhood of the Dark Kingdom is yours to command."