Sivesk, Depths Queen

When Sivesk, Depths Queen enters the
battlefield target player puts the top three cards
of their library into their graveyard.
Spider creatures you control have deathtouch.
{u}{b}: Discard a card. Target player puts the top
three cards of their library into their graveyard.
If you discarded a creature card, that player puts
the top four cards into their graveyard instead.