add link from normal dungeon 2-3C to 2-3D, and add room 2-3D

english/normal-dungeon/2/3-C.md

@@ -1,3 +1,5 @@
 You prepare to fight the figure. In a quick stroke, you slice through the figure's ghostly form 🤺. They crumble into a pile of dust ⚱️. In the distance, you see a flight of stairs leading to a large doorway 🚪.
 
-* [Climb stairs](../3/1.md)
+* [Climb stairs](../3/1.md)
+
+* [Investigate the dust pile ⚱️](3-D.md)

english/normal-dungeon/2/3-D.md

@@ -0,0 +1,3 @@
+You sift through the shadowy dust in search for clues 👇. There is nothing there but dust. Dissapointed, you wipe your dusty fingers on your shirt 👕. The dust will not come off your hands. Strange.
+
+* [Climb stairs](../3/1.md)