Papyrus, the Disbeliever

Whenever you cast a skeleton spell, surveil X,
where X is the spell's converted mana cost. (Look
at the top X cards of your library, then put any
number of them into your graveyard and the rest on
the top of your library in any order.)
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"Human, you are not going to have a bad time.
I am going to have ... lots of fun!"