|Behind the scenes|
Willow Tomb is a cave in the northeast of the Needle Hills region. It is connected to Weaver's Shield via a thin walkway of rock. The cave contains numerous vein pods, which surround the central willow tree which gives the cave its name. The tree bioluminesces naturally in the twilight.
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After retrieving all three unobtanium shards, Able Ryder went to Willow Tomb to find the first harmonic needed to find the Well of Souls. Upon arriving, he contacted Dr. Monroe for instructions. With the shards positioned around the tree, Ryder left and reported to Kendra Midori.