Determine

Play when a monster controlled by your predator is bleeding you, after blocks are declined. Lock this reacting imbued. The monster is now bleeding your predator's predator. Or play when a monster controlled by your predator or prey plays an action card. Lock this reacting imbued and cancel that action card as it is played (no cost is paid, and the monster doesn't lock). That monster cannot play the same action card again this turn.