Fire Aspect

Fire Aspect is an enchantment applied to swords, maces, and spears that ignites entities hit with melee attacks.

Fire Aspect can be obtained from enchanting tables, drops from mobs that have spawned in a raid,‌[Bedrock Edition only] books obtained by fishing, librarian villagers, and in the following structure loot chests: desert pyramids, strongholds, ocean ruins, ancient cities, mansions, pillager outposts, mineshafts, monster rooms, jungle pyramids, and from vaults in trial chambers.

Fire Aspect adds 80 fire-ticks (4 seconds of burning) per level to the target. Because the first hit is caused by the item with this enchantment, the first second of fire damage is not recognized. Targets receive 3HP and 7HP damage with level I and II respectively. Formula to calculate the fire damage, expressed in 1HP: damage = (level × 4) – 1