Final Answer:
Frey's weapon is a magical sword named "Sumarbrander," which possesses the ability to fight on its own, illuminates like the sun, and always returns to its owner after being thrown.
Step-by-step explanation:
In Norse mythology, Frey, the god associated with fertility, prosperity, and sunlight, wields the powerful sword Sumarbrander.
This enchanted weapon is not just a mere tool but a sentient entity with remarkable attributes. Sumarbrander, meaning "the summer sword" or "sword of summer," serves as a symbol of the warmth and vitality that Frey brings to the world.
The sword's extraordinary abilities extend beyond conventional weaponry. Sumarbrander has the unique capability to fight autonomously, making it an invaluable asset in battle.
Its independent combat prowess signifies Frey's connection to nature and his divine influence over the changing seasons. Additionally, the sword illuminates with a brilliance akin to the sun, emphasizing its association with the god of sunlight and fertility.
One of the most distinctive features of Sumarbrander is its return to Frey after being thrown. This mystical aspect underlines the inseparable bond between the god and his weapon, highlighting the symbiotic relationship between the divine and the tools they wield.
The return of the sword symbolizes the eternal cycle of life, death, and rebirth, echoing the cyclical nature of seasons and the perpetuity of natural forces.
In essence, Frey's weapon, Sumarbrander, goes beyond a conventional tool of war, embodying the essence of the god's dominion over prosperity, sunlight, and the cyclical rhythms of the natural world.