Make the Obsidian Crown disable all healing

[Paineframe]

If there's one thing the cloaked taught us, it's that having someone running around 99% invincible except for one specific so-called "hard counter" (that doesn't actually counter the thing but just lets you fight the owner on semi-even terms) is shitty and miserable. Removing the crown's chem immunity completely is unlikely to help much, since the wielder will then be able to use healing chems.