Numerous posters are placed in both Upper and Lower Sanctuary. Upon inspection a simple message is written in both Orcan as well as Common:

Stay true to your heritage, noble blood as well unequaled strength. Heed this calling and rally forth to the banner of clan Redclaw. Prove your strength, show no weakness and you shall be granted entry within our swelling ranks - Morghur, Warsinger of He Who Watches.