Make a spirit visible ?

[Dracien]

Hello i was reading Guardian of the forest page 132

A small silver trumpet, when blown, summons forth any ghosts or spirits in the area and renders them visible.
Vision of the Haunting Spirits, MuMeIm 40, R:Touch, D:Sun, T:Room (Base 15, +1 Touch, +2 Sun, +2 Room). Operates
twice per day (+1 level). Final Level: 41

This item is use ton make visible 3 ghostly gladiators with magic might : 20. But the trumpet has no penetration. It is an error or the spell Vision of the Haunting Spirits, MuMeIm 40
don't need to penetrate to make ghost visible ?
Thanks for your responses.

[Berengar]

@Dracien

This item is use ton make visible 3 ghostly gladiators with magic might : 20. But the trumpet has no penetration. It is an error or the spell Vision of the Haunting Spirits, MuMeIm 40 don't need to penetrate to make ghost visible ?

it appears, that sounding the trumpet is just a cue for the gladiator spirits to coalesce and arm up: so Penetration is not an issue there.
But otherwise its lack of Penetration makes that trumpet indeed rather useless.

Cheers

[Dracien]

Thanks, but the spells itself if cast by a magus need to penetrate ?

[Berengar]

@Dracien

Thanks, but the spells itself if cast by a magus need to penetrate ?

I should think so. By ArM5 p.150 box Muto Mentem Guidelines it changes spirits (MuMe) by attaching visibility (Im) to them.

Cheers

[Dracien]

It think this too. Thanks for all.

[Flarg]

Visions of the haunting spirit does indeed require penetration.
I believe the trumpet to be flawed. It should have been designed with penetration.
In my I have increased the daily number of uses and given it a penetration of 26.
This seriously increases the trumpets usefulness.

[Dracien]

I thank this too. Probably a error of the writer.
I will add penetration.
Thanks for all