The breath is an area attack affecting every creature in a cone 10 meters long by 5 meters wide for a Medium or Large creature (Huge: 20 by 10 meters; Colossal: 30 by 15 meters). The attack automatically deals (no attack roll) [(CR+2) x 1d6] damage (for example 6d6 for CR 4). Damage is halved if the victim succeeds on a DC 13 Dexterity check. The creature must wait 1d4 rounds before using its breath again after each use. For simplicity, once damage exceeds 6d6, each additional d6 is replaced with a +3 bonus. So a CR 14 dragon's breath deals [6d6 + 30] damage.

The creature gains an extra movement action per turn while flying. On the first round of combat, the creature gains a +5 bonus to attack rolls and +1d6 damage if it is flying and attacks a creature on the ground.

On the first round of combat, if the environment allows the creature to hide, the target must succeed on a Wisdom check (DC [15 + Dexterity modifier]) or be Surprised. If it successfully attacks a surprised target, the creature deals +1d6 damage and any creature with lower Strength than its own is Knocked Prone. The creature gains a +5 bonus to all Stealth checks and to Initiative.