Mihai's Whisper

Madness {p/b}{p/u}
Target player discards a card and puts the
top card of their library into their graveyard.
Hysteria — If Mihai's Whisper was cast for it's
madness cost, that player discards X cards and
puts the top X cards of their library into their graveyard, where X is the amount of life paid to
cast Mihai's Whisper instead.