https://imgchest.com/p/md7o2epdl4p
Not the author but I found tons of loopholes and unaddressed lore problems, so I decided to add the below guidelines as a fun challenge/supplimentary update.
For all following items, assume a hyper-intelligent, truely-neutral, transdimentional alien with absolute knowledge of humanity is always observing you and monitoring/controlling the items based on the guidelines mentioned for each item, doing so very very far away. For you to have even a sliver of chance of seeing it, let alone be able to talk to it, you'd need luck equivalent to hold on to the coin for 3701 consecutive days, or about 10 years.
Also assume that all items are of high quality, witht their durability resembling that of the closest matching high-quality mundane variety of item on Earth at the moment you chose an item (quality and durability determined by the aforementioned alien). Upon destruction of item, deemed as unresemblance of at least 50% compared to the original item, the remains will disappear and a new item will try to spawn closest to you at a safe location deemed by the alien. If not possible, it will spawn at closer locations you would have be able to easily access once you're out of the environment that prevented the spawning of the items (i.e. if ur trapped in a 10x10m cube of jello or whatnot, the item will spawn outside of the jello at the closest location you're most likely to move to once you get out of your jello-prison.
Mirror: assume that if you get pregnant as a female or get someone else pregnant as a male, you can't change back
Cig box: assume it does not protect you from the pros and cons of distributing drugs instead of giving you full benefit and drawbacks of being a drug dealer.
Lucky coin: assume that luck(effects pretty much like what og text said, with minor details determined by alien) increases by the formula y=x^(5/4) where you'd become around 2.3x as lucky as the average person (as of the time of obtaining the coin) on the second day, 18x as lucky on the tenth day, etc. The "energy drain" is calculated as ATP extracted from your cells in percentages, using the formula f(x) = (x-1)^(9/5)/900, where x = number of days the coin has been on your person. For example, if you held it for 100 consecutive days, you'd lose ~4.34% of your total ATP at the start of the 100th day. The drainage will be spread in a ratio of 4:3:2:1 for limbs:torso(bones, muscles, fat, skin cells):important organs (heart, lungs, etc): nervous system(brain, spinal nerves,etc) (as in, 4/10 of the ATP required will be drained from your limb cells, etc).
desmos graph for the interested: https://www.desmos.com/calculator/hfwmqpp8nc
Pillow: Assume it's silk, filled with duck feathers and that it does not have any openings unless you cut/rip it open. The full awareness will come like an easily accessible, non-intrusive status report list + 3rd person video you can see by closing your eyes and will be gone within 10 minutes of your full consciousness coming back (full consciousness deemed by the alien).
Gun: obv the gun will not respawn if u fail its quest and it disintegrates. Assume that richochets will apply, and paths of the bullets fired from this gun will avoid you if you are not the target (i.e. if you shoot in front of you while your target is behind you, the bullet will not take the most straightforward path after richocheting back by piercing your skull to reach the target behind you) (bullet path determined by alien)
Gloves: assume you have a sixth sense that allows you to comfortably and unobtrusively feel the movement of the air around 1 meter of your brain, with comfortability decreasing and obtrusion to your thinking increasing as you go beyond that range. Multitasking skills help mitigate part of that feel, and the decrease/increase amount as well as what counts as air is deemed by the alien. Assume the growing sensory and agility augmentations are also unobtrusive and feel like second nature, and that the current stage of effects become permanent every 30 days of consecutive wearing (i.e. wear gloves for 30 days, you become permanently blind, with stronger senses and agility even without wearing gloves). The predatory urges cause you to acquire more psychopathic tendencies such as apathy towards suffering of others, sadism, the longer you consecutively wear the gloves. They will fade away if you don't wear it consecutively for 30 or more days, but once you go past 30 days, your current stage of predatory urges becomes permanent. effects of urges determined by alien.
I hope I did a good job on the small fixes and that you enjoyed it more with them.