Black Magic, level 3. Ability. Recall 0.
Over a few hours, mark 2 Stress to make a gem from your own blood. Whoever wears it can speak to you mind to mind and no one else can hear. Whenever you attend to the gem, at any distance, you see through the wearer's eyes, hear through their ears and read their surface thoughts. The wearer cannot close the link. Destroying the gem ends it. You can hold as many gems as your tier. Any magician who examines the gem knows it was made with black magic.