Behemoth Crawler

When Behemoth Crawler enters the battlefield,
take all creatures from your library and put them
into your graveyard.
Whenever Behemoth Crawler attacks, you may
have its base power and toughness become 0/1
until end of turn. If you do, Behemoth Crawler
gets +X/+0 until end of turn where X is the
number of creature cards in your graveyard.
"It's more painful death than acid"