The thing at the top of your shopping list, the one thing you'd bring into the real world to make your life easier, perhaps the thing that makes you wonder why everyone in the setting doesn't have one.
Mine's the bag or trunk that's bigger on the inside, especially when it's used as a home away from home, most recently seen in Fantastic Beasts. Everytime I see one, ingame or in a movie, it makes me drool
>>50536075
Wand of Unlimited Prestidigitation.
>>50536075
Object of Holding is up there
But Decanter of Endless Tequila is the obvious best choice
>>50536075
Warlock style alter self
>>50536075
Self-raising flour. It's too good to be true.
>>50536075
Flying brooms would be the best.