I now just got a few more item ideas:
-the ring of gigantism (curse the one who wears the ring to make their boobs gigantic and can only be taken off by finding a bra of shrinking or a well trained mage)
-the eye of truth (an item for the protagonist to use to see hidden items on the girls but limited from it being an eye so it needs to blink after awhile)
-the gauntlets of hope (a curse and blessing at the same time. helps the protagonist to mix potions but if used too much,the gauntlets will just stop helping you and just punch you in the face for a game over)
-the mask of illusions (an item for the necromancer girl to use on a zombie girl to make the zombie girl look like a normal girl so you will have to see the monster they go against. If it's a necromancer symbol,the girl is a zombie girl in disguise)
-the curse of booba (a special item that girls can have on them that makes their boobs grow more and more if the protagonist gives them a boob potion by chance. It's a 1 in 100 chance for the girl to have that special item on them in endless mode but only on endless mode)
-the slime beaker (a different slime beaker/side potion that the protagonist can use against aggressive or angry girls to turn them into horny slime girls with the side effect of being horny now. The only cure is the protagonist just closing the window until the slime girl leaves into the dungeon)
-the golden booby trap (a item/cursed item to give to Pinkie or any bandit class girls. The golden booby trap is just a simple golden coin to be placed on the table but if stolen,the coin turns purple and curses the thief with the equivalent of the ring of gigantism. If the thief returns the coin,the curse is lifted and the thief will be back to normal after a day)
-the spiritual curse (it doesn't do anything but if combined with the eye of truth,it turns the eye into a living spirit that retrieves the golden booby trap from the dungeons for the protagonist to use. The spirit also retrieves some extra coins to give to you as thanks before flying off into the dungeon to find necromancer girl)
-the whip of gold (a whip that Pinkie gets after day 21 but not to use against the protagonist but to thank the protagonist and even give some golden coins to the protagonist too. It's a blessing for Pinkie so I wanted to be nice to her)
-the never ending hope of Alchemy (not an item or a potion but a combination of them two into one. An item imbued with the potions that works like a firework,a small celebration that brings every girl to watch the show of sparkling potion magic in the sky. Also a nice way to advertise and bring more adventurers to come to the protagonist's potion making service for potions)
I hope some of my ideas can give you inspiration for future items in this game