Eerie

Eerie is an ability word introduced in Duskmourn: House of Horror, where it is connected to the enchantments, and particularly to the plane's Rooms.
==Description==
A card's eerie ability triggers every time an enchantment enters the battlefield under the player's control or whenever you fully unlock a Room.
Eerie is similar to the constellation ability, which also triggers whenever you fully unlock a Room. Notably, Rooms are enchantments so that a single Room card could trigger an Eerie ability twice.
==Rulings==
*If a permanent with an eerie ability enters at the same time as one or more enchantments, its ability will trigger for each of those enchantments.
*A Room is "fully unlocked" once both halves have been individually unlocked.
*An ability that triggers "whenever you fully unlock a Room" triggers when a door becomes unlocked and the other door of that Room is already unlocked, or when both doors of that Room become unlocked simultaneously.
==Examples==
==Trivia==
*During Vision Design, this was the Afraid mechanic.
==References==