Windvane Meadow is the location where Calamity Ganon reforms into Dark Beast Ganon after being defeated in the Astral Observatory. To prevent Dark Beast Ganon from escaping and destroying Hyrule, Zelda summons Link to Windvane Meadow and erects a barrier of light to contain them both.[3] She also bestows Link with the Bow of Light to aid him in his quest to Destroy Ganon.[4]
A stone Treasure Chest containing a Soldier's Claymore can be found in the aforementioned Monster Stronghold. It can only be unlocked after defeating all of the monsters in the camp.
A Korok can be found by breaking the Jar shaped like an Acorn hanging from a broken wagon on the side of the northern Road that passes through the Meadow. Another Korok will appear after examining the Leaves with Fairy Dust moving around a small group of Trees in the east of the Meadow. Another Korok is can be found in a Natural Hiding Spot under a Rock in a rock formation, north of the Central Tower. A Korok can be revealed by breaking another Acorn shaped Jar hanging from a large Tree along the southern edge of the Meadow, north of Lake Kolomo. Following the Flower Trail that starts in the Meadow and leads west into a forest between the Meadow and the Exchange Ruins will reveal another Korok.
During the Quest "Study the Blade", an unnamed character instructs Link to cut Grass in Windvane Meadow to strengthen his skills with a sword.[5] After Link collects five Restless Crickets, he notices that he can swing his sword quicker.[6] As a result, he receives a bonus combo for one-handed Weapons.[7]
↑THE SITE OF THE FINAL BATTLE Link battles Dark Beast Ganon in the wide-open space of Windvane Meadow in Hyrule Field. Princess Zelda erects a barrier of light around them, preventing Ganon from leaving the area. (Creating a Champion, Dark Horse Books, pg. 411)
↑I entrust you with the Bow of Light—a powerful weapon in the face of evil. Link...you may not yet be at a point where you have fully recovered your power or all of your memories... But courage need not be remembered... For it is never forgotten. — Zelda (Breath of the Wild)
↑To refine his sword technique, Link has been instructed to train in Hyrule Field by...cutting grass. He'll have to collect proof of some kind to show that he's completed the assignment. — Gallery (Hyrule Warriors: Age of Calamity)
↑After training Link realized he could swing his sword more swiftly, giving foes less chance to strike. He really did learn something from cutting grass! — Gallery (Hyrule Warriors: Age of Calamity)