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In page Diarmuid Ua Duibhne:

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Diarmuid also owns several other weapons known by specific names, including Gáe Buidhe, the Yellow Spear, Crann Buidhe, the Yellow Shaft, and Gáe Dearg, the Red Spear.[4] The spears inflict wounds that cannot be healed.[5] Diarmuid uses Móralltach and Gáe Dearg for adventures that are matters of life and death, Beagalltach and Gáe Buidhe and lesser battles.[citation needed]