Summon Marked Homunculus

(Dragonmarked, page 154, DnD 3.5)

Conjuration (Summoning)

Level: ; Artificer 1; Sorcerer/Wizard 1
Components: V, S, M,
Casting Time: 1 round
Range: Close (25ft. + 5ft./2 levels)
Effect: One summoned homunculus
Duration: 1 hour/level (D)
Saving Throw: None
Spell Resistance: No

This spell allows a caster with the Mark of Making to summon a special homunculus. If you possess a least Mark of Making, you can summon a dedicated wright, expeditions messenger, or furtive filcher homunculus (ECS 284-286), or an arbalester homunculus (Magic of Eberron 152). If you possess a more powerful Mark of Making, you can instead summon a true homunculus (MM 154), an iron defender (ECS 287), a packmate (MoE 153), or a persistent harrier (MoE 153).
A small glyph resembling your dragonmark appears somewhere on the homunculus's body. If the homunculus is reduced to 0 hit points, it explodes in a burst of blue, green, and purple light that deals 1d6 points of damage to all adjacent creatures except you.

Material Component: A pinch of dragonshard dust.

Dragonmark: Any Mark of Making