To the left of the Massive Moss Charger miniboss is a long corridor.Continue cutting vines as you gradually head downward, hugging the wall to the right till you reach a room full of acid.Go left till you reach a stone slab, then cut the vines.From where Cornifer is found, head left through the gap in the rock wall, then hop up the ledges.Drop back down to Cornifer, use the stone slab to reach the ledge, then go right to find the Grub.Go right, jump up to enter a hidden area, then cut the vines holding the stone slab.From where Cornifer is found, head left through the gap in the rock wall, then hop on top of the ledges.Drop again, hugging the right side, and take the first exit to the right.Drop from Dirtmouth and head left till you reach the vertical shaft.Go left and through the room with burrowing worms, then through the next room filled with acid.From where you first meet Cornifer, head down to the bottom.
Break it to reveal two enemies and the trapped Grub.Just north of the shaft above the Stagway Station, head up to find a small ledge near a breakable wall.Fall into the Forgotten Crossroads from Dirtmouth, then go right until you reach the end of the path.
