Esqueleto de la pedrera musgosa (Moss-Pit Skeleton)
Esqueleto de la pedrera musgosa 

Si el Esqueleto de la pedrera musgosa fue estimulado, entra al campo de batalla con tres contadores +1/+1 sobre él.
Siempre que uno o más contadores +1/+1 se pongan sobre una criatura que controlas, si el Esqueleto de la pedrera musgosa está en tu cementerio, puedes poner el Esqueleto de la pedrera musgosa en la parte superior de tu biblioteca.
Texto de reglas (Oracle, inglés)
If this creature was kicked, it enters with three +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on a creature you control, if this card is in your graveyard, you may put this card on top of your library.
Legalidad
Aclaraciones de reglas (en inglés)
2024-11-08
To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions. The spell's mana value remains unchanged, no matter what the total cost to cast it was.
2024-11-08
If you copy a kicked spell on the stack, the copy is also kicked. If the copied spell is a permanent spell, the token the copy of that spell becomes when it enters is also kicked.
2024-11-08
If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
2024-11-08
If a spell's kicker cost was paid, the spell is "kicked."
2024-11-08
The kicker ability doesn't let you pay a kicker cost more than once.
2024-11-08
If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
2020-09-25
Moss-Pit Skeleton's last ability triggers if a creature enters the battlefield under your control with +1/+1 counters on it, as well as when +1/+1 counters are put on a creature you already control.
2020-09-25
Moss-Pit Skeleton's last ability triggers only if it's already in your graveyard as +1/+1 counters are put onto a creature you control.