And? Its a Paladin Spell. Just go Paladin 9 and you got yourself a Spirit Shroud. Means it'll take a while to get the combo online, but its a strong one.
Plus, I think considering the fact that Clerics, Paladins, Warlocks and Wizards have access to it, makes it rather easy to persuade a DM that a Sorcerer should be able to pick it up as well. Why should the Wizard have it, and the Sorcerer should not?