Board Thread:Questions and Answers/@comment-27125665-20151101084604/@comment-6102960-20151102112807

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Crossnize gives a Soul to the monster, yes, that is the point.

But it does not grant Soulguard. A monster can have a soul but not have Soulguard. In some cases, a monster even has Soulguard with no natural way of gaining soul itself.