Unbreakable: Grey Health cannot be removed

[sacred notch]

I think Unbreakable is not working correctly. I used broken heart with it and Ring of Phantom Pain to fill half of my HP to grey health. But when I take out Ring of Phantom Pain I loose my grey health even thought I have Unbreakable on my prism

[midnight abyss]

that's not what is intended, "cannot be removed", basically means it won't degrade over time. If it worked like you stated, theoretically you could infinitely remove the ring of phantom pain, and reequip and gain more grey health everytime