In The Lord of the Rings LCG, Dúnhere is a hero with a permanent effect:
Dúnhere can target enemies in the staging area when he attacks alone. When doing so, he gets +1(Attack).
What does it mean for him to attack "alone"?
Does it mean that he cannot combine with other attackers when attacking the staging area?
Or does it mean that if you want to use this ability, no other characters may make an attack of any kind? For just you, or for all players?
An example to highlight: There's a Goblin Sniper in the staging area and an Eastern Crows engaging me. May I use (for instance) a Wandering Took to attack the Eastern Crows, and also use Dúnhere's ability to attack the Goblin Sniper?