Лавовый кристалл

The Lava Crystal is a shard of imprisoned heat, born from molten rock and sustained by the power of your Anima. So long as Essentia Vitae flows, it will never cool.

Use on any block in the world to ignite it, at a cost of 100 EV.

Place a Lava Crystal in the fuel slot of any furnace, and it becomes an inexhaustible flame, drawing 50 Essentia Vitae per item smelted. Ten seconds of burn time per operation - exactly enough for one item.