And for something minor, it’s a question:
I have to ask another question: How exactly does Line of Effect work? The way I read Eclipse, they are all spread effects, but I’m not sure.
Is there an area-spell-version of “Indirect Fire”? Normally when you cast an area spell, it only affects what’s in a direct line from it’s point of origin, which would mean that, for example, you cannot cast a Boundless Acid Splash into a building and expect it to hit anyone (due to a lack of line of effect), even with Indirect Fire. Same goes for something like a Boundless Grease, which couldn’t affect every wall in the building due to the lack of a straight line.
I’d have guessed that “Indirect Fire” means line of sight and line of effect, but I’m not sure about it anymore .-.
Hm. This was posted on a segment about level 10+ spells, but seems to be at least partially about Eclipse’s Metamagic. To start with the Metamagic…
The Extension Metamagical Theorem covers manipulating how spells reach their target. Like all Metamagical Theorems it can be applied in a wide variety of ways. At it’s simplest, this just improves the range – but modifiers like Indirect Fire, Global, and Trans-Dimensional blatantly allow spells to ignore obstacles – although you still need to know where the target is.
Indirect Fire (at +2 levels) obviates the need for line-of-effect to the spells point of origin as long as you know where the target is. The game master may want to require that there be some sort of open route – even if it’s “down the chimney, through the guardroom and into the winch room” or rule that the spell goes through the ethereal plane so ethereal barriers will halt it or something – but few games go into that kind of detail anyway, so if you want to throw a fireball into the space on the other side of that closed door with indirect fire… go right ahead and give it a shot.
- Making spells with Extension that simply – say – turn a corner on the way to their target would only be about +1 level. They’re mostly only relevant in fairly contrived situations though, even if that goblin shaman with a mirror on a stick and some corner-turning spells can be a nuisance.
- Making area effect spells where the actual effect or an area spell bypasses obstacles or turn corners isn’t really a job for Extension; it’s a job for Area or Sculpting. (Personally, I rather liked it when spells (and explosives) were a bit more physical – such as when Fireball filled a certain volume, and could fill a network of corridors – but those days are long gone). You might even be able to get away with making a spell that only affected living things – and thus could have an area of effect that passed through nonliving barriers.
- Making a burst that filled a volume (and thus would go around corners or fill corridors), rather than just stopping at barriers would probably be Area +1 (If the potential backlash problems don’t persuade the game master to make it +0).
- Making an Emanation that passed through inappropriate targets (like walls and ceilings) rather than stopping at them would probably be Amplify, at +1 level for Detections and other low-energy effects, +2 levels for things like Fireball. That way you could throw it at a wall and kill creatures behind said wall anyway.
- Making a spell that simply wraps itself around corners and such so that it fills all the available unsealed open space within it’s normal radius/volume/whatever of effect is Sculpting, probably at a mere +1 level (It may be happening during the casting instead of being predetermined, but you can’t exclude areas).
I didn’t include a theorem that would allow you to directly target someone who’s location is unknown (although you could fake it by making a spell selective, barrier penetrating, and with a large enough area of effect to be sure that your target is in it at some horrendous number of added levels) because that is even more boring than scry-and-die tactics. It leads to your heroes and / or your villains suffering sudden, overwhelming, attacks from nowhere.
Leaving the metamagic behind, the level 10+ spells generally (and intentionally) leave a lot open to interpretation. They are, after all, each an astounding act of magic on the part of an incredibly powerful (and presumably unique) spellcaster – and usually are plot devices rather than regularly-cast spells. Still…
- Most of them don’t really involve questions about their lines of effect; when you steal abilities from a dying foe, crown a king, or cleanse a soul… you generally aren’t trying to do it through a keyhole or around a corner.
- Others ignore “targeting” by their nature. Spells that lead you to potential customers, or create pocket dimensions, or cause geological upheavals, aren’t really cast at particular targets.
- Yet more are obviously targeted normally; a 30d6 Frostball that animates those slain by it works a lot like a normal Fireball. It’s just nastier.
There are still a few oddities though.
For example, the twenty-first level spell Boundless Sea Of Flames lets the caster “unleash a vast flood of force from the elemental planes, dealing 3d6 damage per round for five rounds to everything in a small continent-sized area”.
It doesn’t say anything about HOW (although it pretty obviously involves a gate of some sort), so that is more or less up to the caster. Open a vast gate to the elemental plane in the center of the area to be affected and let a tidal wave of elemental power pour out? Some may have time to escape as the wave sweeps over the horizon, some areas may be sheltered by natural barriers, and so on – but you’ll probably get a greater effect in the center. Simply overlay the two dimensions so that everything – including sealed areas – is affected evenly? It will be instant and pretty much inescapable, but far less dramatic. Open thousands of lesser gates across the area? You’ll get a mix of effects – with even more variation depending on which elemental plane you tap into. A mighty flood from a central gate may leave dwellers in flying castles unharmed while making them effectively under deep water with an overlay certainly will not – but the latter would spare cities with planar barriers.
Of course once you’re throwing around spells of level twenty and up, details are usually something to discuss and then get the game master to narrate anyway.