Section - The ivy
The petter-ivy is a petter-backdrop. Every petter-room contains the petter-ivy. The printed name of the petter-ivy is "ivy". Understand "ivy" as the petter-ivy. The description of petter-ivy is "Like most things in here, the ivy is sticky to the touch and splotched with yellow mold."
Instead of cutting the petter-ivy when the player carries a petter-sharp petter-machete:
say "You don't need any ivy."