Index -> Appendix -> Block
Some game text can cause a character or adversary to become blocked from one or more missions. A character or adversary who is blocked can't become assigned, even if he is ready. (However, if he is already assigned when he becomes blocked, he remains assigned.)
Blocked characters and adversaries who are still ready can be used in other ways; they just can't be assigned to a mission.
Antarctic Rescue's game text reads: "When you play this mission, your opponent chooses a team character. He is blocked." He blocks your Samantha Carter, whose game text reads: "
, Stop Samantha Carter -- Turn an obstacle at the current mission face down." You can't assign Samantha Carter to the mission, but you could still use her activated ability to affect an obstacle there.
If a card in play that blocked a character or adversary is placed in a discard pile, that character or adversary immediately becomes unblocked. (Events are never in play.)
Blocking a card is sometimes a cost of using an activated ability. To pay such a cost, the card must be ready and not already blocked.
P90's game text reads: "Stop this gear, block a team character from the current mission -- Obstacles cost power +1 to play until the end of the current mission." The team character you block to pay this cost must be ready and not already blocked.
