An old but loved little fey reworked for 5e:
Tiny fey, chaotic neutral
Armor Class: 15
Hit Points: 10 (3d6)
Speed: 30 ft.
Strength: 5 (-3)
Dexterity: 18 (+4)
Constitution: 10 (+0)
Intelligence: 14 (+2)
Wisdom: 13 (+1)
Charisma: 11 (+0)
Skills: Perception +5, Stealth +8, Sleight of Hand +5, Acrobatics +5
Senses: passive Perception 15
Languages: Common, Elvish, Sylvan
Challenge: 1 (200 XP)
Magic Sense. The phase sprite can pinpoint the location of magical items within 100 feet of it.
Rapier. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8+4).
Teleport Self (Recharge 4-6). The sprite magically teleports, along with any equipment it is wearing or carrying, up to 40 feet to an unoccupied space it can see. Before or after teleporting, the sprite can make one melee attack.
Teleport Other (Recharge 2-4). The sprite magically teleports another target it can see within 20 feet, along with any equipment it is wearing or carrying, up to 20 feet to an unoccupied space it can see.