Reach
Undergrowth — When you cast this spell, reveal the top X cards of your library, where X is the number of creature cards in your graveyard. You may put a green permanent card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
A land card that produces green mana, even a Forest, normally has no color.
Because tokens aren’t cards, they never count for undergrowth abilities.
Creature cards with other types, such as artifact creature cards, count for undergrowth abilities.
Hatchery Spider’s ability triggers as you cast it, and that ability resolves before the spell itself. It resolves even if that spell is countered.
If a card in your library has {X} in its mana cost, X is considered to be 0.