Usual disclaimer, my game is not a canon setting, is high fantasy (elves and dwarves and orcs oh my!), etc etc.
I'm looking to create spells that can destroy cities. These cities will have powerful mages within them so the spells need to be high level and high penetration. They also are in enemy territory so will probably need to be arcane connection range.
I've been thinking about different spells to tie into the strengths of specialised casters (specialised by forms), so terram city killers, auram city killers, etc. It is anticipated that these spells will be created with multiple magi working together in the lab and cast with Wizards communion.
I've come up with the following:
Deluge of the Million Boulders
R: Arc, D: Diam, T: Group
This spell does pretty much what it says on the tin, rains down one million boulders, each about a cubic pace in size upon a city. The boulders do not fall all at once but across the duration of the spell (about 8000 boulders a second) and across an area about 2 kilometres in diameter. The boulders fall from a height of several hundred feet making for quite a messy impact on whatever they hit.
(Base 3, +4 arc, +1 diam, +2 group, +5 size)
The Aquatic Dome of Doom
R: Arc, D: Sun, T: Ind
The target area is covered with a dome of corrosive liquid. Not a true dome, it is slightly flatter but is still taller in the centre. The liquid does +5 damage to anything it touches and is held in place by the force of the spell. Given the duration if cast early in the day/evening, when the spell ends, anything that was under the dome is likely entirely gone unless specifically protected against corrosion. Even stone and steel will have been eaten through. The dome is nearly a kilometre and a half across and nearly 300m tall at the centre. Quite aside from the acid, anyone not right at the edges of the dome when it is cast is likely to drown.
(Base 5, +4 arc, +2 sun, +1 Rego req, +7 size)
R: Arc, D: Moon, T: Ind
The target city is struck by a huge vortex of gale force winds that swirl and batter anything within. This is quite dangerous, debris is thrown around, travel is dangerous and smaller and shoddier dwellings might be torn apart. This spell is not itself a city killer but is meant to be cast in combination with the Vortex of Annihilation (below)
(Base 3, +4 arc, +3 Moon, +3 size)
The Vortex of Annihilation
R: Arc, D: Moon, T: Ind
This vicious spell turns the winds of the Vortex (above) into an abrasive material in the same fashion as Talons of the Winds (Ars 5 corebook, page 127). This does +5 damage to anything in the vortex. With the long duration of the spell, stone and wood will be worn to sand and anyone sheltering in anything but sturdy stone basements is likely to be horridly shredded.
(Base 4, +4 arc, +3 Moon, +3 size)
More later! Any comments on my spell creation (anything I got wrong). Any good and dramatic ideas for destroying cities? Share!