Volcanic Eruption
9th-level transmutation (Cleric,Druid,Wizard)
- Casting Time: 1 minute
- Range: Self (360 ft. radius)
- Components: V, S, M (a blade carved of obsidian, which shatters when the spell is cast)
- Duration: Concentration, up to 1 minute
You draw molten lava up through the ground, which erupts to fill a sphere with a radius of 360 feet. The entire radius (even the sky above it and the underground beneath it) immediately becomes difficult terrain for the duration, and each creature within that radius must make a Dexterity saving throw. On a failed save, a creature takes 2d6 bludgeoning damage and 2d6 fire damage, and its walking speed is reduced to 0 until the start of its next turn. On a success, a creature takes half as much damage and suffers no other effects. A creature with full cover is still affected, but automatically succeeds on its saving throw. You take no damage from this spell, and automatically succeed on saving throws against it. Until the spell ends, if you can see some part of the area of the spell, you can use a bonus action on each of your turns to force each creature in the area to make another saving throw or suffer the above effects. You cannot cast this spell if you are more than 360 feet away from an area of solid ground at least 10 feet wide, but once it is cast, it lasts for the duration, even if you are out of range. When a creature wearing metal armor fails its saving throw against this effect, it takes 2d6 additional fire damage, and has disadvantage on attack rolls and ability checks until the start of its next turn (as if affected by the heat metal spell). Firenewts, earth-based elemental creatures (such as gargoyles), or fire-based elemental creatures (such as salamanders), do not take damage from this spell. Instead, such a creature is healed, regaining hit points equal to half the fire damage inflicted. Only firenewts or creatures of the elemental type can benefit from this effect. The volcanic eruption damages objects in the area and ignites flammable objects that aren't being worn or carried. Structures in contact with the ground in the area that take fire damage from this effect take extra bludgeoning damage equal to half the fire damage. If a structure drops to 0 hit points, it collapses and potentially damages nearby creatures, as described in the earthquake spell. The eruption can be heard up to 500 miles away. This spell leaves its entire area a blackened ruin incapable of supporting plant life for a full year. After that time, however, the ground is more fertile than it was before the spell was cast.