Diabolic Dragon (Ancient)

Smoke doesn't impair the dragon's vision; they ignore the Concealed condition from smoke.

90 feet. DC 40 will A creature that first enters the area must attempt a Will save. Regardless of the result of the saving throw, the creature is temporarily immune to this monster's Frightful Presence for 1 minute. Critical Success The creature is unaffected by the presence. Success The creature is Frightened 1. Failure The creature is Frightened 2. Critical Failure The creature is Frightened 4.

Trigger The dragon is critically hit with a melee attack Effect The dragon channels the rancor of Hell back through the body of their foe, overwhelming it with an infernal assault on the mind. The triggering creature takes 10d6 mental damage with a DC 42 will save. Holy creatures use an outcome one degree of success worse than they roll on their saving throw.

Trigger A creature within the monster's reach uses a manipulate action or a move action, makes a ranged attack, or leaves a square during a move action it's using. Effect The monster attempts a melee Strike against the triggering creature. If the attack is a critical hit and the trigger was a manipulate action, the monster disrupts that action. This Strike doesn't count toward the monster's multiple attack penalty, and its multiple attack penalty doesn't apply to this Strike.

Any fire damage that a diabolic dragon deals, including fire damage from spells, is imbued with the unholy power of Hell to scorch the spirit as well. A creature takes spirit damage instead of fire damage if that would be more detrimental to the creature (as determined by the GM). A diabolic dragon is immune to the diabolic fire of other diabolic dragons, the fire from divine immolation, and similar effects.

The dragon makes two claw Strikes and one tail Strike in any order.

The dragon recharges their Hellfire Breath whenever they score a critical hit with a Strike.

The dragon unleashes a blast of infernal fire that deals 21d6 fire damage in a 60-foot cone (DC 42 reflex save). The dragon can't use Hellfire Breath again for 1d4 rounds.

Trigger The monster's last action was a successful Strike that lists Improved Grab in its damage entry, or the monster has a creature Grabbed or Restrained Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with as a free action. This attempt neither applies nor counts toward the creature's multiple attack penalty. The monster can instead use Improved Grab as an action and choose one creature it's grabbing or restraining with an appendage that has Improved Grab to automatically extend that condition to the end of the monster's next turn.

Trigger The monster's last action was a successful Strike that lists Improved Knockdown in its damage entry Effect The monster attempts to Trip the creature as a free action. This attempt neither applies nor counts toward the monster's multiple attack penalty.