Konan's mystery has a limit of up to 9 tagged ninjas. This can be cross team.
(eg. in GNW, Team A's Pain: Chikushodo (Animal Path) uses mystery and tags 4 ninjas in Enemy team A, Team C's Pain does the same for Enemy team C). In round 2, team A's Konan can target the enemy team B, hit 1 target there, and the mystery will also hit the other 8 tagged in Enemy team A and C. Something like a mini Tendo, if done correctly.
IIRC, tag is removed after the mystery... can't recall atm.