Tame Chest

A single Small size box comes to life at your Command. The target animates and becomes a creature under your control until it is dispelled, reverting it to a normal box, or until it reaches 0 Hit Points, which both kills and destroys the box.

Its locomotion type reflects the limb theme and animal spell component. A treasure chest with spider legs requires a spider, scorpion, or crab for example.

As a Bonus Action, you can mentally Command any creature you made with this spell if the creature is 100 meters of you (if you control multiple creatures, you can command any or all of them at the same time issuing the same Command to each one). You decide what action the creature will take and where it will move during its next turn, or you can issue a general Command, such as to guard a particular area. If you issue no Command, the creature only defends itself against Hostile creatures. Once given an order, continues to follow it until its task is complete.

Tame Chest Base Stats:
HP: 25
AC: 16
Attack: +6 to hit
Damage: 1d8+2
STR: 6
DEX: 14
CON: 10
INT: 3
WIS: 3
CHA: Craftsman's tool proficiency bonus of artificer
SPEED: 30 feet

Has 30' blindsight and is totally blind beyond this range.

Tame Chests have various special Commands:

Headbutt: Chest stays closed, and jumps into a target of the artificer's choice. Default is Blunt damage, but the DM may rule a different element based on materials and design.

Bite: Chest opens its lid and closes its lid on the target of the artificer's choice. Default is Blunt damage, but the DM may rule a different element based on materials and design.

Enhancements: Tamed Chests can be Commanded to activate a special ability granted through crafted or magical means included in its original construction. Dart traps for wooden boxes and Heat Metal for metal chests are common. The chest does recognize itself as having a name and might respond to specific words for specific attacks.