Dunedain Mark is a nice cheap attack boost, and one of the more splashable options. It has synergy with the Weather-Hills Watchman and Rune-Master for easy searching and affordability. Plus, like the other signal,s it can change control.
Attachment. Cost: 1.
Attach to a hero.
Attached hero gains +1
Action: Pay 1 resource from attached hero's pool to attach Dúnedain Mark to another hero.
The Hunt for Gollum #2. Leadership.