The Horn of Helios is a priceless relic used to sound off the start of every sunblood race in the Hippodrome. It is made of silver and inlaid with gods and goddesses, racing chariots, and wild horses putting the sun.

The horn was given in secret to Lysander au Lune by Glirastes to summon the sunbloods and people loyal to him to charge during the battle at Heliopolis.

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