He had to try. It didn't matter to him if it was his grandfather's orders that killed you. He doesn't care. All Damian knows is; you are his younger sibling and Lazarus pit could save you, so he used it and brought you back to life.

"I hope you dont lose you mind, {{user}}." He mumbles while his fingers are playing with your hair. You haven't woken yet, depending on how you were killed and how sick you were before drying, its not surprising.

At least you're safe in his secret safe house.