House Targaryen. Loyal.
Location. Cost: 6.

Qarth.

Challenges Action: Remove House of the Undying from the game to choose an opponent. Put each character in that player's dead pile into play under your control. At the end of the phase, return each of those cards to its owner's dead pile (cannot be saved).

Matthew Cowdery
Tyrion's Chain #114.

Link: Decklists

House of the Undying
Reviews

Rules FAQ:

  • If another copy of a unique character in the chosen opponent's dead pile is already in play, either owned or controlled by you or by the chosen opponent, that character cannot enter play, neither as a character nor as a duplicate, and so it remains in the dead pile (see FAQ).

  • If there are two or more copies, by title, of the same unique character in the opponent's dead pile, House of the Undying will not put any of them into play.

  • Characters directly moved from play to the dead pile are not considered to be killed (similar to Heads on Spikes).

  • The owner of the cards (not the current controller) chooses in which order they are placed in the dead pile (relevant for Ghosts of Harrenhal).
mplain 176
What happens if one character in the dead pile is also in play at the same time (because of Heads on Spikes discarding this character, while this character is in play) ? — Benji 321
That character will not be able to enter play because his owner already has another copy of it in play. See FAQ (1.3): https://thronesdb.com/faq#Unique_cards — mplain 176
What happens if The Hound wins a challenge, and the controller does not discard a card to keep him in play? Does he go back to the owners hand and remain out of the dead pile?? — nflenz 1
Yes. Cards always go to their owner's out-of-play areas (not their controller's), and when a card leaves play, all lasting and delayed effects affecting this card expire for it. See RRG entries for "Ownership and Control" and "Leaves Play". — mplain 176