In "The Last Olympian" by Rick Riordan, Poseidon’s powerful call to arms resonates, stirring a sense of urgency and unity among his followers. His proclamation, "NOW, MY BRETHREN!" signifies a pivotal moment where the forces rally together in defense of Olympus. The intensity of his voice suggests that it transcends mere communication, inspiring both fear and courage across vast distances.

The command to "STRIKE FOR OLYMPUS!" emphasizes the importance of action against impending threats, pushing the characters to confront their challenges head-on. Poseidon's leadership exemplifies the need for solidarity in the face of adversity, rallying everyone to protect their home and honor their legacy. This moment captures the spirit of the epic conflict that defines the narrative's climax.