I'll try:
Cirdan -- Spirit, 4 cost, 3, 1, 2, 4Hp
At the end of the round, discard Cirdan.
While Cirdan is in play, each unique character gets (choose 1): +2 willpower, +2 attack, or +2 defense.
Thranduil -- Tactics, 5 cost, 2, 3, 2, 3Hp
At the end of the round, discard Thranduil.
When Thranduil enters play, (choose 1): discard a non-unique location or each player may search their deck for a silvan ally and play it as if from the hand for no cost.