Fireball

Fireball was an arcane spell that created a tiny ball of fire that flew forward from the caster, exploding in a huge fireball at a point designated by the caster. While an extremely potent spell, the caster had to take care to avoid catching allies in the explosion, or to accidentally strike an obstruction and detonate the spell early.

Effects
Before the Spellplague, fireball at its weakest had a range of over four hundred feet,, but after the collapse of the Weave its range was greatly reduced, only reaching a hundred feet.

Components
In the Raumviran spellcasting tradition, the verbal component was the word Kelenta. Many versions had verbal and somantic componeents but also the need for a tiny amount of bat guano or sulphur.

Realmslore
In Waterdeep in the Year of the Prince, 1357 DR, Kyriani placed a fireball spell in a ring of spell storing, which Onyx the Invincible used to surprise the marauding Aviss and Fellandar, though they emerged smoking from the flames.