Grasping Tentacle
The Watcher in the Water #73 (x4/x3)
(12) 2 3 0 3

Forced: When Grasping Tentacle is attacked, discard the top card of the encounter deck. If that card has a shadow effect or is a Tentacle enemy, attach this card to an attacking character as a Tentacle attachment with the text: "Attached character's Attack and Defense are reduced to 0."