Elsin

Elsin are evergreen plants that visually look like a mix of an olives, weeping willows, and madrones, though it usually grows as either a bush or a small tree.

Fruit
The plant is most famous for its fruit, which is pink and vaguely resembles a peach, and can vary in size from about 3-15 cm in diameter. Elsin fruit's most recognizable traits are its highly addictive taste and the extremely high-quality, durable string that encompasses its circumference. It grows naturally in most forests on Lagrën, but has been exported to the other Magrön continents, and even a few other Worlds, where they grow mostly in farms harvesting their fruit and string.

Addictive taste
The fruit is often cooked into a clear soup and is considered a "delicacy of the forest" as wild elsin plants are not that rare in most parts of Lagrën, and are in bloom for most of the Star Year, and in most weather conditions. The flip-side to elsin soup is that, in too large quantities or concentrations, its taste itself becomes addictive, meaning that eating it raw without chewing or by chugging the soup will take more before starting to meaningfully affect a person. One can regularly eat about 800 grams of cooked elsin fruit before it becomes practically impossible for a most people to stop eating eating the soup on their own, so it is recommended that one does not eat one fruit's worth of soup per meal. Uncooked fruit, however, is four times more addictive, despite tasting inferior to the soup.

Elsin string
"A single elsin string is tougher than a hundred hairs braided together" is a common folk description of elsin string that roughly but surprisingly accurately shows the tensile strength of elsin string, which is thus used widely to craft high-quality bow strings and other such mechanical components.

Other than its strength, elsin string is also hailed for its quite high heat resistance, requiring about 700 degrees Celsius before showing any signs of being influenced by the heat at all, and beginning to burn at around 1000 degrees Celsius.

These two qualities of elsin string have made it a grand financial hit, caused a few wars, and is currently used across most of Magrön as a high-grade string material, and is even used in armor in several regions and kingdoms across Magrön.