Card Text:
Sinister Citadel is not unique.
KO a character you control >>> Put a +1 ATK / +1 DEF counter on target leader character you control. Use this power only once per turn.
Activate >>> Remove a +1 ATK / +1 DEF counter from a character you control. If you do, put a +1 ATK / +1 DEF counter on target Secret Society character you control.