You drop some bat-bellybutton lint. It's an ingredient to the ULTIMATE SWORD OF GLORY. What you need to do is to go back to the starting village, go to the left topmost house, search the houseplant to the left side of the fireplace three times to get the mystery leaf, go to the Dungeon of Hellaterror and kill the Mobile Grey Rocks in the corridor leading up to the third shrine until one of them drops the GreyRock (drop rate 0,04%) and then fish at left side of the moat of the Dark Lord's Poisonous Castle entrance until you catch the Sword Ointment. Then take those items and your starting weapon, the CrapSword (hopefully you did not sell it) to the Blacksmith in the Northern South Town and select the dialogue options 1, 4, 1, 1, 2, 3, 4, 5, 7, 43, 2, 1, 1, 2, 3, 2, 1, 1, 5 and 3 while it is raining and your system time is 23:11, to get the WONKY SWORD. Go all the way back to the bottom of the ANNOYING LABYRINTH where you fought the PALETTE-SWAPPED MINOTAUR boss. You will find a new boss there, the HELLAKILLER BUNNY. Defeat him without using any healing items or magic and you will have a 30% chance to get the ULTIMATE SWORD OF GLORY. You can increase this chance to 32% by putting over 1000000000 gold pieces into the shrine box at the bottom of the EVEN MORE ANNOYING LABYRINTH dungeon.