Éomer
The Mountain of Fire #3 (x1)
Héroe
(10) 1 3 2 4

Response: After Éomer commits to the quest, spend 1 resource from his resource pool to immediately declare him as an attacker (and resolve his attack) against an enemy in the staging area.

...he was young, and he was king; the lord of a fell people.
–The Return of the King