Arnor Battlefield
The Siege of Annúminas#21 (x3)
Location
3 (3)
Arnor.  
While Arnor Battlefield is in the staging area, each non-unique enemy gets -5 engagement cost.

Travel: Each player deals 1 damage to a hero he controls to travel here.

A smoke as of fire and battle arose, and again the sun went down in a burning red that faded into a grey mist...
-The Fellowship of the Ring