All priests can cast all healing spells. It was different in IWD I've heard, but in BGII evil priests can cast resurrect, heal etc. It may be different in ToB with the quest spells but in SoA you can cast any spell in any alignment.
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Goddess of Undress
Co-owner of the Evil Petting Zoo and Sorceress of the HADB
OLD COOTS eye candy and Disrobed Division of the ORT
And her sidekick Pink
"High hopes...an endless river...forever and ever"