Criatura — Sierpe
6 / 4
Despojos — Cuando la Sierpe esporas de vigor entre al campo de batalla, la criatura objetivo gana la habilidad de vigilancia y obtiene +X/+X hasta el final del turno, donde X es la cantidad de cartas de criatura en tu cementerio.
La Sierpe esporas de vigor no puede ser bloqueada por más de una criatura.
If there are no creature cards in your graveyard, the target creature just gains vigilance until end of turn.
Because tokens aren't cards, they never count for undergrowth abilities.
The value of X is determined only as the undergrowth ability resolves. If the number of creature cards in your graveyard changes later in the turn, the target creature is unaffected.
If Vigorspore Wurm gains menace, it can't be blocked at all.
Creature cards with other types, such as artifact creature cards, count for undergrowth abilities.