This card feels like a bank for later type of deal
It also pairs well with Gitaxian Probe, since the extra information ensures you attack their most vulnerable resource, whether it be creatures to return, dredgers, or something like Conflagrate
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Harbinger of the Tides
the distribution is wide
Then, anytime you cast another colorless spell with Ugin in play, you'll exile another permanent that is one or more colors
