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The Rune Wars were historical wars where the mortals of Runeterra used the World Runes to fight each other. These wars were so brutal that they erased multiple civilizations, landmasses, and much of the recorded history from before them.
- These snippets are from the Noxian Calendar from Realms of Runeterra. However, they may be incorrect or biased due to the Noxian point of view or the old age.
- 13 BN — The Rune Wars
With Helia lost, dangerous magical artifacts soon began to find their way into the wrong hands. On the fields outside Khom, the renowned mage Tyrus and his apprentice witnessed the first devastating attack in the Rune Wars - a sight that would haunt Ryze's nightmares for the rest of his unnaturally long life. 
- 25 BN - 13 BN
After Helia fell to the ruination, the remnants of an ancient order from the Blessed Isles whose mission had been to gather and protect the most dangerous artifacts in Runeterra struggle to keep knowledge of the World Runes hidden. Political tension follows as nations are unwilling to trust one another for fear of being unwittingly destroyed by these Runes.
- 13 BN - 3 BN
The leaders of two rival Noxii nations plead with Tyrus of Helia, the master of Khom. The encounter ended in the complete destruction of Khom and the surrounding territories by the power of two World Runes. Tension reaches a tipping point and magical warfare erupts. Entire nations are decimated and the world is brought to its knees from the sheer power of the World Runes. At this point Ryze works with his master to try and claim the Runes and put them in hiding, while the world continues to be devastated. 's master, Tyrus, tries to use two World Runes for his own means; confronting him, Ryze kills him and vows to never use a World Rune, making it his mission to safeguard them from misuse., in parley at the village of
The Brackern sense the magical conflict and choose to hibernate underground, opting to wait out the conflict with the hope that humanity will destroy itself and they can then live in peace again.
Towards the end of the Rune Wars, desperate cabals of warrior-mages cast off their flesh, entering and dominating the spirit realm. Their shadow magic corrupted the thoughts of mortals everywhere, giving fuel to ever more horrendous acts in the war. The Demon is created as a byproduct of shadow magic, and tirelessly hunts each shadow mage, ending their dark dominion.
Refugees of the Rune Wars find a land with magic-nullifying Petricite, and settle there. Demacia. Kilam took and to these refugees in the hope that their mother would never find them there.arrives on Runeterra, joining Orlon and other refugees on their way to the land that would later become
- 25 BN - 13 BN
- arrives on Runeterra.
- The continent in the eastern hemisphere of Runeterra was forgotten by the rest of Runeterra during the Rune Wars.
- Realms of Runeterra, Page 66/67