Follow the path east to grab an Arcane Bottle just before the broken bridge and then take the upper path to some Grape Gel x3 in a small alcove.

Continue on the upper path and through the stone doorway, heading south and then north to where you previously found the discovery for an All-Divide, and then backtrack to the room where you first met Lambda to grab a Hourglass.

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Grab the chest at the end of the cave before you watch the skit and enter the ruins.

You can now backtrack toward the first stone door and take the lower path to a Gnome Cloak and the Wise Words skit before you enter the warp nearby.