Arcane Demolition

You select up to a 50-foot-radius area you can see within range, you may make any shape or size of area that fits within this area if you wish to specifically designate a zone. You may select any number of constructs, objects, structures, or vehicles within the area that you can see, or choose to affect all nonmagical objects, structures, and vehicles within the designated area. All portions of the selected targets within the area become magically marked with a red line which shows how much of each will be affected when the spell is completed. As constructs, objects, structures, and vehicles move into or out of this area, the red markings and affected portions will change accordingly, and you may designate whether to include or exclude any construct, object, structure, or vehicle you see enter or leave the area (unless you simply chose to affect all nonmagical objects, structures, and vehicles). You then grind the chalk into the gunpowder, mix it, and ignite it upon completing the ritual, the materials becoming a magical red flare that launches itself 100 feet over the center of the area you targeted and detonating, shedding bright red light over 100 feet and dim red light an additional 100 feet, centered on the flare. The red flare remains lit so long as you maintain concentration, hovering above the area you targeted.

However much of each selected object, structure, and vehicle is within the area of effect at the time the spell is completed begins to rattle, reverberate, and shutter before they begin to violently shake apart, causing all affected targets to take 5d10 thunder damage once this spell is completed and an additional 5d10 thunder damage at the start of each of your turns for the next 5 rounds or until you end concentration. For the sake of calculating damage to structures, consider each affected 5 foot cube of a structure's area affected as an individual target to receive damage. Constructs, objects, vehicles, and structures that enter the area after the spell has finished casting are not affected, but constructs, objects, vehicles, and structures that exit the area of effect before the effect ends stop being affected as soon as they move outside of the area. You must remain within range and line of sight of the designated area of effect in order to maintain concentration on this spell, and the spell ends as soon as either of these conditions are no longer met. While creatures are not affected by the damage of this spell, collapsing structures and vehicles can still damage creatures within the area.

At Higher Levels. When casting this spell using a spell slot of 5th or higher level, increase both the initial damage and the damage per turn by 1d10, extend the maximum duration concentration can be held by 1 round, and increase the maximum radius of effect by 10 feet for each level above 4th used.