Source: Unearthed Arcana 8, Ranger
By taking up the Seeker path, you are drawn into the unknown wilds far from civilization in search of lost treasures, forgotten evil, and sites of primal magic. You understand that the trackless wilderness can harbor many secrets. Some of those secrets—such as a lonely oasis providing water to a desert realm—must be protected. Others—such as an ancient idol infused with the foul magic of the demon worshippers who crafted it—must be destroyed before their evil awakens once more.
When your spirit companion manifests, it takes the form of a giant eagle.
Your companion spirit lends its sharp combat senses to you and your companions. As a bonus action, you invoke your spirit companion and choose a creature you can see. Until the end of your next turn, all attacks made against the chosen creature have advantage.