Keg of Alchemist's Fire

A keg of alchemist's fire lobbed at a creature or an object deals 21 (6d6) Fire damage on a hit. Further, the target is set ablaze and takes the damage again every round (in the case of a creature, at the start of each of its turns) until the fire is put out. A creature within reach of the blaze can take an action to smother the flames using a blanket or carpet, reducing the Fire damage by 2d6. Three such actions are needed to fully put out the fire.