Butt-Head's Hideous Laughter

Each opponent exiles cards from the top of their library until that player has exiled cards with total mana value 20 or more.
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"Heh heh... huh huh huh... uhh huh huh...her
heh heh... huh huh... huh huh huh huh... heh
huh huh huh... uhh huh huh... heh heh heh...
uhh huh huh... heh heh heh.. uhh huh huh...