Firearms
In the setting of Nailara, gunpowder and firearms exist but are incredibly rare. For most countries, the thought of spending a large fortune on researching these new, unreliable weapons seems foolish when the same money could be spent on the more reliable and well understood arcane solutions. Maintaining supply lines of ammunition is a risk, when a mage can simply rest and be ready to fight once more.
Despite this, alchemical researchers continue their pet projects to understand how to control these forces, even without thorough funding. Simple cannons and fireworks have found their way into some societies, especially with pirates who value the power to sink ships even with a small crew lacking arcane talent.