Depends on whether your GM reads the list strictly or not. The only light spell on the list is Dancing Lights (a cantrip). It costs 2500 gold and requires a 9th level caster.
If your GM just sees the list as a set of suggestions. Then take the level of the darkness spell and compare it to the other spells on the list. For regular darkness, I'd go with caster level 10 and 5000 gp, just like for darkvision since the spells seem to counter each other's effects. Every spell level up seems to cost 2500 gold, so the rubric is pretty simple. Cantrips get counted as level 1 spells (apparently).
2500 gp per spell level, based on the sor/wiz spell list first. The minimum caster level is 9 + (spell level -1) [minimum 9].
Both darkness and silence can be made to last 1 year with Hallow and Unhallow, but only on a fixed location.
I would have no problem with Permanency applied to darkness. But I might have objections with a permanent version of Silence place on an object.
There is a reason that permanency doesn't have a fixed calculation for making every non-instantanous spell permanent. Some spells can be too good to allow permanent versions of, and basing the cost purely on level, does not take the strength into account.
What exactly counts as a particular site, building, or structure for the unhallow spell?
The most illuminating part is the fact that it is an 40-ft radius emanation.
As such it is rather limited, as it is stopped by anything providing total cover (Here a bit down under 'area').
Based on that, it can actually only cover a single room, or an open space.
Personally I would allow it to cover more than that, such as a house or tempel (if within the radius of the spell, or a widened version), because that seem to be RAI.
Can't you key it to a darkskull for carrying around?
Can't you key it to a darkskull for carrying around?
I didn't know that item, thanks.
That would surely do the trick. Although for a portable darkness spell, I might be inclined to find a solution that is a bit cheaper than 60k.
Can't you key it to a darkskull for carrying around?I didn't know that item, thanks.
That would surely do the trick. Although for a portable darkness spell, I might be inclined to find a solution that is a bit cheaper than 60k.
Perhaps an Ebon Wayfinder (from Seeker of Secrets) will better fit your budget?
Could you cast Unhallow upon say, a portable shrine?
What about a unholy symbol?
Per RAW that doesn't seem to be the case, as those aren't fixed locations, thus not really being a "particur site, building, or structure".
However basing it on darkskull as RD suggested, and using that price, it really shouldn't matter what item it is.
Note that the Darkskull specifically mentions NOT having an effect tied to its Unhallow...
Note that the Darkskull specifically mentions NOT having an effect tied to its Unhallow...
Um...
This skull, carved from ebony, is wholly evil. Wherever the skull goes, the area around it is treated as though an unhallow spell had been cast with the skull as the touched point of origin. Each darkskull has a single spell effect tied to it. This spell is from the standard list given in the unhallow spell description, and it cannot be changed.
You get to pick one of the spells listed in the unhallow description. Or these:
aid, bane, bless, cause fear, darkness, daylight, death ward, deeper darkness, detect magic, detect good, dimensional anchor, discern lies, dispel magic, endure elements, freedom of movement, invisibility purge, protection from energy, remove fear, resist energy, silence, tongues, and zone of truth
Note that the Darkskull specifically mentions NOT having an effect tied to its Unhallow...
What? I don't remember that.
*Goes to have a look*
Nope, you're mistaken.
"This skull, carved from ebony, is wholly evil. Wherever the skull goes, the area around it is treated as though an unhallow spell had been cast with the skull as the touched point of origin. Each darkskull has a single spell effect tied to it. This spell is from the standard list given in the unhallow spell description, and it cannot be changed.
Hmmn. I may be remembering an older version. So, run with your Darkskull!
Verily I beseech thee, procure for thyself a pink umbrella.