Sentinel. Landroval cannot have restricted attachments.
Response: After a hero card is destroyed, return Landroval to his owner's hand to put that hero back into play, with 1 damage token on it. (Limit once per game.)
Descendant of Thorondor cannot have restricted attachments.
Response: After Descendant of Thorondor enters or leaves play, deal 2 damage to any 1 enemy in the staging area.
Ranged.Vassal of the Windlord cannot have restricted attachments.
Forced: After an attack in which Vassal of the Windlord attacked resolves, discard Vassal of the Windlord from play.
Eagles of the Misty Mountains cannot have restricted attachments. Eagles of the Misty Mountains gets +1 and +1 for each facedown attachment it has.
Response: After another Eagle character leaves play, you may attach that card facedown to Eagles of the Misty Mountains.