A gorgon can use its breath weapon once every 1d4+1 rounds to create a 60-foot cone of green gas. Those caught in the area of the gas can attempt a DC 21 Fortitude save to resist the effects, but those who fail the save are immediately petrified. This petrification is temporary-each round, a petrified creature can attempt a new DC 21 Fortitude save to recover from the petrification as long as it is not caught within the area of effect of the gorgon's breath weapon a second time while petrified. A creature exposed to the gorgon's breath a second time while already petrified becomes permanently petrified, and can no longer attempt to make additional Fortitude saves to recover naturally. The save DC is Constitution-based.