" Summon ghost jackals "

My original homebrew character Nehmis, for Dungeons and Dragons, performing one of his low-level necromancy spell "Summon ghost jackals".
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Material and gesture components:
The caster has to hold, carry or wear a symbol of Anubis (as a very religious person, Nehmis chooses the first option when possible). He also must position the fingers of one hand to form a stylized jackal head, while holding a small object between the index and middle fingers to symbolize an eye. Nehmis uses an amber for the eye, and two amethysts serve as his focusers to summon his jackals from the Ethereal plane. The failure rate of the spell increases if one or more of these elements are missing or substituted.
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Use :
Like all Anubians, Nehmis is able to communicate with jackals -including their ghosts. He therefore usually sends Maatka and Maatbâ to scout, in particular to go and see what is behind a solid surface (often a wall or a door) and report this information to him. He summons them to defend himself or fight only when he has no other undead under his control.
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Constraints:
Maatka and Maatbâ cannot go further than around a hundred feet around Nehmis, nor levitate more than one or two meters from a solid surface. The spell's duration is approximately one hour.
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Anecdotes:
- Maatka and Maatbâ are protective ghosts attributed to Nehmis, and the first undeads that he had under his responsibility. They consider each other as equals and trusted allies.
- According to the Anubian people, jackals are representatives and messengers of Anubis on the material plane. Ghost jackals are therefore among the only intelligent undead tolerated by their religion. However, they are revered and respected, and Anubian summoners never send them out to take reckless risks, unless lives are in danger.
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