Descend beneath the Hollow Tree
With the pinwheel repaired, enter the Hollow Tree. Deal with the obstructing Flytrap using a spiky fruit, then make the upper climb. The web-covered obstruction sends you toward the lower route. Ignite a web ball and burn the lower barrier, keeping it above the water so it does not go out. Continue through the Tree Root route into the Old Graveyard. Pull the roots in the Crypt to reveal the Toad painting, then use Dark-Light to free him. Restore the missing vase on the right for the mission’s Boo before leaving the Crypt.
Defeat the Three Sisters and escort Toad
Return to the Old Graveyard for the Three Sisters. Keep your back turned long enough for them to uncover their faces, then turn and flash them before vacuuming. Their mirrors can block a premature flash. Capture the sisters while avoiding the remaining attacks. Toad is afraid of water: carry him and launch him across the wet gap instead of expecting him to follow. Use the paired weight mechanism and coffin route to reach the Sewer and the Gardener’s Lab Pixelator. The tree’s emerald requires a separate detour: take a bucket from behind the burned web, fill it and water the right-hand sprout before flashing the grown flower.
Collectible checklist
Haunted Towers gems — #6 Tower Lobby and West Garden, #7 Hollow Tree, #8 Old Graveyard
Boo checklist — Crypt: After freeing Toad, restore the vase to the right of his painting and inspect it.