Spider's Den

{t} Add {1} to your mana pool
{b}{b} Put a Web Token on this land.
{b}{4}{t}Make a token that's a copy of this card.
{b} Sacrifice this card and all other cards with
the same name. Create X 1/1 Black Spiders
with deathtouch where X is equal to the number of Web Tokens on your lands.