Beckon the Lostling

Action · 60 ft · V, M (a button or a bent key that nobody has missed) · Concentration, up to 1 hour

Action, 60 ft, concentration up to 1 hour. You whistle the note lost things answer to: a Lostling scrambles out of the nearest crack into a free space you can see — a knee-high figure of lost gloves, keys and bells — led by its Glove, its Key or its Bell (your choice). It fights beside you until it drops to 0 HP or the spell ends, then falls apart into odds and ends that are gone when you look again. It acts right after you, strikes once per Attack action with your spell attack modifier for its dice + your spellcasting modifier, and forces saves against your spell save DC. Lostling — Small fey, speed 30 ft; it can't be grappled or restrained. Gathers Again: the first time it drops to 0 HP it gathers again at once, with hit points equal to three times the slot level. Glove: AC 14, 10 HP + 2 per level you have; Filch (2d8 + your modifier piercing) takes the target's reaction until its next turn, and it can Disengage or Hide as a bonus action. Key: AC 14, 10 HP + 2 per level you have; Jab 2d8 + your modifier force; Turn the Key (bonus action) — it and a creature it can see within 30 ft trade places, an unwilling one making a CHA save to stay put. Bell: AC 13, 20 HP + 3 per level you have; Jeer (2d6 + your modifier psychic) goads the target into attacking anyone but the Lostling at Disadvantage until the Lostling's next turn. Higher slots: each slot level above 3rd adds three dice to its strike, and Gathers Again grows with the slot.