“ L1 wizard spell
This spell must be cast for 31 consecutive days by one wizard to create a +1 sword,-2 to anyone else holding it(other than sword owner).No special ingredients or quality of blade, the only requirement on this part is it must be a short sword or longer and must be a true sword. The sword must draw blood from a living creature of at least 1-1 hit die every day and The blade is -1 until the 31st casting, when it becomes fully and permanently enchanted .Variants that enchant other weapons could be possible.”
“ You find a patch of edible funghi. They taste well and all, no ill effects. UNLESS you consume some beverage, even 3 (three) days after eating it. Then you become really sick with pains, vomiting, all the fancy stuff. As a gift or good meal, it could be a cruel joke or to make sure the heroes spend their time focused on the mission. And the fine soup you had in the inn yesterday could have some in.
(Inspired through a real-world fungus. Was really used to cure alcoholism.)”
“ Chekov's Spell -- This spell has a two-fold effect. The first is to make the target item almost-unnoticeable to anyone not specifically looking for it. The second is that someone who has seen the item will remember it when they encounter a situation that would be perfectly solved by use of said item.”