What is the name of the creature who helps the heroes in the final battle of the Lord of the Rings universe?

The creature who helps the heroes in the final battle of the Lord of the Rings universe is known as the Great Eagles. They are giant eagles who live in the Misty Mountains and are also known as the Eagles of Manwë, after the god of the air. They have long been the allies of the people of Middle-earth, and play a crucial role in the defeat of Sauron at the end of the Third Age.

In the final battle, the Great Eagles arrive with Gandalf the White to aid the armies of Gondor and Rohan against the forces of Mordor. They attack the Nazgul and their winged beasts, breaking the enemy's lines and turning the tide of the battle. They then transport Frodo and Sam from the erupting Mount Doom to safety, thus ensuring the destruction of the One Ring and the defeat of Sauron.

The Great Eagles are some of the most powerful and important creatures in the Lord of the Rings universe. They are wise and noble, and always ready to aid those who fight against evil. Their strength and loyalty make them invaluable allies to the peoples of Middle-earth.