Rules FAQ
- If The Wolf’s Den leaves play, any card that was placed in shadows by its ability will continue to have the shadow keyword.
House Manderly. The North.
Reaction: After a character you control is sacrificed or killed, kneel The Wolf's Den to place the bottom card of your deck in shadows with a shadow token on it. While that card is in shadows, it gains shadow (X). X is its printed cost.
Link: Decklists
Rules FAQ