[Taqwus]

Yup. Gift of Health can heal any and all afflictions of friendlies in your dominion. Not only that, but all your units in your dominion have higher maximum hit points -- up to roughly double in 10-str dominion. For 40 gems (base), it's a bargain -- of course, you need to boost to prevent dispels or somebody else overwriting with his own Gift of Health. It's very, very nice to have.