When the Black Willow left Lulia it settled inside a cave found in a mountain and started weeping in memory of its sister. Its tears formed a pond, and they started flowing out of the cave and up the cliffside, forming the Water Stairway, a waterfall which flows upside down since its water flows upwards instead of flowing downwards like other waterfalls. Its water has the ability of reversing time and some of it was used to heal Faragonda after Valtor trapped her in a tree in Season 3.