So what kind of magic items can you find in a “rough-and-tumble fantasy setting”? Here’s a few samples:
Brass Knuckles of Button-Seeking
Right on the button. Sleep well!
You gain + 1 to attack and damage rolls made with this magic weapon. In addition, the chance to score a critical hit is increased (19-20).
Chain of Inescapability
Weapon, rare (requires attunement)
You gain + 1 to attack and damage rolls made with this magic weapon. An opponent hit by this weapon cannot choose the disengage action nor can it use any kind of extradimensional movement as long as it is faced by the owner of the Chain.
Fist Cane of Brutality
When you roll a 20 on your attack roll with this weapon, the target takes an extra d12 of force damage.
Lupin’s Briefs of Heroics
Wondrous Item, legendary (requires attunement by a bard)
Antique underwear of a Hero long gone. How the hell did you got them?!
While you wear these legendary briefs you can use bardic inspiration on yourself.
Hand Wraps of Grasping
You have advantage on grapple checks when you’re the attacker. Doing so, you have a reach of 10′. In addition, you have advantage on Strength (athletics) checks that involves climbing.
Hat of the Watchful Eye
Wondrous Item, uncommon
You need to watch your back on these streets.
The hat have three charges. You can spend a charge to gain advantage on Wisdom (perception) checks for 10 minutes. The hat regains 1d3 expended charges daily at dawn.
Slimy Padded Vest of Ooze Summoning
Armor (Padded), very rare (requires attunement)
If you’re weird enough to wear this disgusting vest, you gain a + 2 bonus to AC. In addition, you have advantage on Strength (athletics or acrobatics) checks to escape a grapple.
Each time you have lost 22 hit points (cumulative) while wearing this armor, you can use an action to summon a gray ooze that will be under your control until next dawn (and then liquefy). You can have up to 4 oozes under your control at the same time.
Hand Wraps of the Grave
Weapon, very rare
A ghoul stole it from a corpse. A buried one I mean.
You gain + 1 to attack and damage rolls made with this magic weapon. In addition, each time you hit the target takes another 1d4 cold damage.
This item have 5 charges. You can spend one charge to cast Chill Touch or more than one to increase its damage. To regain expanded charges you must put the Wraps of the Grave on a corpse for one night.
Brass Knuckles of Combos
When you make an attack roll on a target you already hit you gain a + 1 to attack and damage rolls made with this magic weapon. This is cumulative up to + 4. If you attack another target this benefit is lost. After a +4 bonus the combo is stopped and it begins anew.