Superheat

Перегрев is a spell that is unlocked at level 20 Artisan. Superheat can be cast on any processing station that uses fire in its operation to increase the processing speed by 90% for 30 seconds. This includes campfires, grills, kilns, furnaces, blast furnaces, and imbuing barrels. About two machines can be kept constantly superheated by a single player casting the spell off cooldown, since it takes 3.75 seconds to cast. It can be effective in the bulk production of clean water, or rapidly processing clay vessels and adhesive to fill up other machines in multi-step recipes.

Journal

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Some wizards study the stars. Some wizards investigate the ways in which an enchantment can be used to make beautiful art. Jillian Varden was only interested in fire. She would study it relentlessly, she created spells to warm the hearth and light candles from a distance. But in her heart she wanted only one thing, to create a flame hotter than anyone else.

The furnace was her answer and she spent weeks studying how one might push the flames harder and higher, so that metal might melt faster beneath their rage. She created a spell that would revolutionize smithing, yet she dreamed still of hotter flames.

Soot was all that remained of her lab. Her body was never recovered.

Trivia

In RuneScape, Old School RuneScape and RuneScape Classic this spell is called Superheat Item, where its function is to act as a furnace and create metal bars.
The original name was called "Ferocious Furnace" during the alpha testing, and was renamed to Superheat during its early access.