Need opinions on this homebrew Magic Item
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"While wearing this circlet, you gain the following benefits:
You have resistance to psychic damage.
Your thoughts can’t be read by telepathy, detect thoughts, or similar magic unless you allow it and you are aware of the target attempting to do so.
Psychic Ward. You're capable of harnessing your entire being into fighting off mental intrusions. Whenever you make an Intelligence, Wisdom, or Charisma saving throw, as a Reaction, you can expend one of your Hit Dice and roll it, adding the number rolled to the saving throw. You can choose to use this feature after rolling the save, but before the outcome is determined.
Whenever you succeed on saving throw against a spell or effect that targets only you this way, you may force the creature that targeted you to take 2d10 psychic damage."