2018-10-05 : A land card that produces green mana, even a Forest, normally has no color.

2018-10-05 : Because tokens aren’t cards, they never count for undergrowth abilities.

2018-10-05 : Creature cards with other types, such as artifact creature cards, count for undergrowth abilities.

2018-10-05 : 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.

2018-10-05 : If a card in your library has {X} in its mana cost, X is considered to be 0.