Artwork for Thermostat

Spell

Thermostat

Created by Mad Lad

This potent spell grants the caster dominion over ambient temperature, allowing them to flood their surroundings with either blistering heat or frigid cold. The intensity, duration, and range of the temperature shift scale dramatically with the caster's magical prowess—a novice practitioner might only sustain the effect for half a minute within a single chamber, while a master of the arcane could alter conditions across entire regions for extended periods. History bears witness to the devastating potential of this spell, as legendary accounts describe ancient mages who warped entire landscapes into scorched wastelands that remain barren to this day. In practice, spellcasters have employed Thermostat to incapacitate foes through heat stroke or fatal hypothermia, making it a weapon of terrible efficiency on the battlefield. Nations have weaponized this spell throughout the ages, using it to decimate enemy agriculture, contaminate water supplies, and systematically extinguish populations through environmental catastrophe. The spell's capacity for mass destruction has made it both coveted and feared among those who seek to command the very forces of nature itself.

Open in Summon Worlds

Details

School
Evocation
Level
3
Duration
30 seconds for novice, up to 1 hour for powerful casters
Range
30 feet for novice, up to 1 mile for powerful casters
Area of effect
sphere(radius: 20 feet)
Ritual
No
Concentration
Yes

Components

Verbal

A series of incantations to invoke temperature control

Somatic

Gestures to manipulate the air around the caster

Material

A small piece of ice or a burning ember

Effects

Effects

The caster can choose to create an area of extreme heat or cold. A novice caster can fill a room with temperatures causing heat stroke or hypothermia for 30 seconds. A master caster can alter the climate over a 1-mile radius for up to 1 hour, causing severe environmental effects that can ruin crops and affect entire populations.