Helm of Telepathy

Action; cast the spell Detect Thoughts (DC 13)
As long as you maintain concentration on spell;
can use a bonus action to send a
telepathic message to a creature you are focused
on. Creature can reply using its bonus action.
While focusing on a creature with Detect
Thoughts; can use an action to cast the
Suggestion spell (DC 13) on that creature. Suggestion recharges at next dawn.