Muto Corpus for glowing ability - possible without ignem?

[Xavi]

The animal requisite is "free". It is cosmetic.

Xavi

[Richard_Love]

@Birbin again

Why does the spell need the An requisite if the appearance of the magic eyes are only cosmetic? Cosmetic effects don't need requisites. See p.115

Cosmetic effects don't require requisites, but that doesn't mean that the troupe can't decide that a particular cosmetic effect does need a requisite. This is an example of how the troupe could make that decision. And as Xavi notes this requisite is "free", in the sense that it doesn't add a magnitude.

[Birbin_again]

The only case I can accept the use the Animal requisite if the spell uses an animal ability. But in this case you cannot create a similar spell on the name 'the eye of the assassin' or such because nightvision isn't a natural ability for humans.

Maybe it seems a nitpicking attitude for a level 5 spell but the magi are able to use this effect in greater dimension.

[Fruny]

@Birbin again

But in this case you cannot create a similar spell on the name 'the eye of the assassin' or such because nightvision isn't a natural ability for humans.

Which is why the spell is Muto. If it were a natural ability, you could get it with Creo.