I was wondering about when your opponents can chain in regards to payments of cost. For example with Sebastain Shaw after I attack I choose to use the leader payment power by KOing two adjacent hidden Hellfire club members. Can an opponent chain a card to move one of the adjacent characters to my visable area to negate the ability or are costs paid at activation similar to Yu-Gi-Oh! so that the adjacent characters would be in the KO pile before another effect could go on the chain?
Sebastian Shaw, Black King
Character, Hellfire Club, 7
16/16
Mutant "” Physical<p>Concealed"”Optional
Leader: KO two hidden Hellfire Club characters adjacent to Sebastian Shaw >>> Ready Sebastian Shaw. Use this power only once per turn and only during the combat phase.
Sebastian Shaw, Black King
Character, Hellfire Club, 7
16/16
Mutant "” Physical<p>Concealed"”Optional
Leader: KO two hidden Hellfire Club characters adjacent to Sebastian Shaw >>> Ready Sebastian Shaw. Use this power only once per turn and only during the combat phase.