Magic Items

Wondrous item, uncommon (requires attunement), Table F
This helm of telepathy takes the form of bejeweled tiara sporting a tiger’s eye stone and the heraldry of the Dukes of Scelptar. When worn, you feel an affection for house cats.
While wearing this helm, you can use an action to cast the detect thoughts spell (save DC 13) from it. As long as you maintain concentration on the spell, you can use a bonus action to send a telepathic message to a creature you are focused on. It can reply-using a bonus action to do so-while your focus on it continues. While focusing on a creature with detect thoughts, you can use an action to cast the suggestion spell (save DC 13) from the helm on that creature. Once used, the suggestion property can't be used again until the next dawn.
This item can be found in the Dungeon Master’s Guide.

Ring, uncommon (requires attunement)

While wearing this ring, you are immune to magic that allows other creatures to read your thoughts, determine whether you are lying, know your alignment, or know your creature type. Creatures can telepathically communicate with you only if you allow it.

You can use an action to cause the ring to become invisible until you use another action to make it visible, until you remove the ring, or until you die.

If you die while wearing the ring, your soul enters it, unless it already houses a soul. You can remain in the ring or depart for the afterlife. As long as your soul is in the ring, you can telepathically communicate with any creature wearing it. A wearer can't prevent this telepathic communication.

Delver. While wearing this ring underground, the bearer of this item always knows the item’s depth below the surface and the direction to the nearest staircase, ramp, or other path leading upward.

Wondrous Item, Uncommon, Requires Attunement

While this polished agate is on your person, you gain a +1 bonus to ability checks and saving throws.

This palm-sized stone is cool to the touch and carved into
the likeness of a beaming halfling face. While you hold
the stone, you gain advantage on Charisma (Persuasion)
checks made against good-aligned halflings.