A glass heart

This scp is a solid glass heart with a small realistic ruby heart at the core which is shaped in a valentine heart 6 inches width 3 inches high and 6 inches long slightly curved at the top.
Two separate things are needed to activate the scp.
1. The scp just finishing its reform.
2. And a person touching it.
The heart has no major properties by itself in till the human is in danger or about to gain a injury or is waiting for a new link in where it will seem to pulse and beat like normal heart would.
When the human that is linked and is in danger or about to gain major injury the heart will gain a crack and what ever was going to harm the human is then canceled but the person will feel what the threat injury would have been but as dull version of the pain that the injury would have done to said linked person.
A what have been fatal injury would feel like a bone just broke and will chip away 3 inches off the heart while, A broken bone would feel like a good punch at the gut and will chip away 2 inches.
Any minor injures like a stubbed toe or a attempt of ripping off finger/toe nails of will feel like a pinch and will make a 1 inch crack.
When the heart fully shatters to its core it will slowly retake form after a few weeks.
If the glass heart is forcefully chipped or broken the linked human effected by the heart will gain horrible scars or even die, The cause of death will usually be heart failure.
All attempts to break the ruby core has failed.
Level 2 security clearance. Safe. D personal.