I was looking at Circle Spells from Heroes of Faerun. I had a doubt about the Prolong option:
Prolong
When you cast a spell that has a duration of 1 minute or longer, you can increase the duration of the spell depending on the number of secondary casters contributing to the spell, as detailed in the table below.
Each secondary caster contributing to the spell must expend a spell slot (no action required). If the spell fails, these spell slots aren’t expended.
Secondary Casters
The Spell Increases Duration By …
1–3
1 hour
4–6
8 hours
7+
24 hours
Let's say a cleric upcasts Aid at lev 3 and their companions, a warlock a druid and a pally all spend a level 1 slot, does it means each secondary caster prolongs the spell by 1 hour to 11 hours or do they only increase the spell duration to 9 h like if only 1 of them had joined?
I tend to think it is the latter, but then why even bothering adding 2 or 3 secondary spellcasters if 1 is enough?
Also does circle magic allow for 1h (and 1m) Bless and Mirror Image with a single secondary spellcaster spending a lev 1 spellslot?
It's 1 hour total for 1-3 secondary casters, not 1 hour for each caster. So in your example the spell would last for 9 hours. (In this particular case it probably isn't worth it.)
This option can be applied to any spell with a duration of 1 minute or longer. Bless and Mirror Image both have a duration of 1 minute, so they are both eligible. Either spell could be stretched out by up to 24 hours with enough people, though with Bless someone would need to be concentrating on it the whole time.
though with Bless someone would need to be concentrating on it the whole time.
Could a group have a trusted priest cast bless, raise its duration to 8 or 24h .. and then leave him in a safe place and enter the dungeon?
Better hope that priest doesn’t stub their toe in that safe location. 😀
If I were DMing, I’d definitely let you do it, but I’d also have there be some chance something happens (like the stubbed toe, or just falling asleep) that might break the concentration. It’s a clever idea, and I’d want you to get some use from it, but there would be no guarantee it would last the whole duration. Off the top of my head, roll a d20 1/hour and on a 1 it goes away. Something like that.
though with Bless someone would need to be concentrating on it the whole time.
Could a group have a trusted priest cast bless, raise its duration to 8 or 24h .. and then leave him in a safe place and enter the dungeon?
This would actually be a really cool way to reward the party for allies they make throughout the campaign as they head towards the final confrontation of the campaign. Have the different groups they have allied with pool their resources to buff the party with long-lasting circle-cast buff spells.
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I was looking at Circle Spells from Heroes of Faerun. I had a doubt about the Prolong option:
Let's say a cleric upcasts Aid at lev 3 and their companions, a warlock a druid and a pally all spend a level 1 slot, does it means each secondary caster prolongs the spell by 1 hour to 11 hours or do they only increase the spell duration to 9 h like if only 1 of them had joined?
I tend to think it is the latter, but then why even bothering adding 2 or 3 secondary spellcasters if 1 is enough?
Also does circle magic allow for 1h (and 1m) Bless and Mirror Image with a single secondary spellcaster spending a lev 1 spellslot?
It's 1 hour total for 1-3 secondary casters, not 1 hour for each caster. So in your example the spell would last for 9 hours. (In this particular case it probably isn't worth it.)
This option can be applied to any spell with a duration of 1 minute or longer. Bless and Mirror Image both have a duration of 1 minute, so they are both eligible. Either spell could be stretched out by up to 24 hours with enough people, though with Bless someone would need to be concentrating on it the whole time.
pronouns: he/she/they
Could a group have a trusted priest cast bless, raise its duration to 8 or 24h .. and then leave him in a safe place and enter the dungeon?
Sure, I don't see why not. The spell has no requirement that the targets have to remain near the caster.
pronouns: he/she/they
Better hope that priest doesn’t stub their toe in that safe location. 😀
If I were DMing, I’d definitely let you do it, but I’d also have there be some chance something happens (like the stubbed toe, or just falling asleep) that might break the concentration. It’s a clever idea, and I’d want you to get some use from it, but there would be no guarantee it would last the whole duration. Off the top of my head, roll a d20 1/hour and on a 1 it goes away. Something like that.
This would actually be a really cool way to reward the party for allies they make throughout the campaign as they head towards the final confrontation of the campaign. Have the different groups they have allied with pool their resources to buff the party with long-lasting circle-cast buff spells.