Source: Eberron - Forge of the Artificer

Level 2 Conjuration (Artificer)
Casting Time: 1 hour or Ritual
Range: 10 feet
Components: V, S, M (a gem worth 100+ GP)
Duration: Instantaneous

You summon a special homunculus in an unoccupied space within range. This creature uses the Homunculus Servant stat block. If you already have a homunculus from this spell, the homunculus is replaced by the new one. You determine the homunculus’s appearance, such as a mechanical-looking bird, winged vials, or miniature animate cauldrons.

Combat
The homunculus is an ally to you and your allies. In combat, it shares your Initiative count, but it takes its turn immediately after yours. It obeys your commands (no action required by you). If you don’t issue any, it takes the Dodge action and uses its movement to avoid danger.

Using a Higher-Level Spell Slot
Use the spell slot’s level for the spell’s level in the stat block.

Homunculus Servant

Tiny Construct, Neutral
Armor Class

13

Hit Points

5 + 5 * spell level

Speed

20 ft., Fly 30ft.

Str

4

(-3)
Dex

15

(+2)
Con

12

(+1)
Int

10

(+0)
Wis

10

(+0)
Cha

7

(-2)
Damage Immunities

Poison; Exhaustion, Poisoned

Senses

Darkvision 60ft; Passive Perception 10

Languages

Telepathy 1 mile (works only with you)

Challenge

0 (0 XP)

Proficiency Bonus

+3

Evasion

If the homunculus is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the homunculus instead takes no damage if it succeeds on the save and only half damage if it fails. It can’t use this trait if it has the Incapacitated condition.

Magic Bond

Add the spell level to any ability check or saving throw the homunculus makes.

Actions

Force Strike

Melee or Ranged Attack Roll: Bonus equals your spell attack modifier, reach 5 ft. or range 30 ft. Hit: 1d6 plus the spell’s level of Force damage.

Reactions

Channel Magic

Trigger: You cast a spell that has a range of touch while the homunculus is within 120 feet of you. Response: The homunculus delivers the spell through its touch