Horse Grass

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Location and Uses
Horse Grass is shaped like a horseshoe and can be used to call Epona. When whistled, the grass plays "Epona's Song." After monsters invade Ordon, Epona will not respond to the whistle for a portion of the story. The Horse Grass becomes usable again when Link wrangles her in Kakariko Village. For the majority of Link's quest, Horse Grass is the only way of summoning Epona. Later on, Link receives the Horse Call, which allows him to summon Epona without the need of a Horse Grass.