When first exposed to bright light, the monster is Blinded until the end of its next turn. After this exposure, light doesn't blind the monster again until after it spends 1 hour in darkness. However, as long as the monster is in an area of bright light, it's Dazzled.
Shadow Blend
The umbral drake's form shifts and blends reflexively with surrounding shadows. It gains an additional reaction each round, but it can use this reaction only for Shadow Evade.
Shadow Evade
Trigger A creature attacks the umbral drake while it is in an area of dim light
Effect The umbral drake further obscures its position. The attacker must succeed at a DC 11 flat check check in order to affect the umbral drake, as if the drake were Hidden for the triggering attack.
AC 18; Fort +8, Ref +11, Will +7
HP 40; Immunities paralyzed, sleep; Weaknesses fire 5
The umbral drake makes one bite Strike and two tail Strikes in any order.
Shadow Breath(arcane, cold, shadow)
An umbral drake spits a ball of black liquid that explodes into a cloud of frigid black shadow. This attack has a range of 40 feet and explodes in a 5-foot-radius burst. Creatures within the burst take 4d6 cold damage (DC 20 basic Reflex save). The explosion of shadow also snuffs out mundane light sources the size of a torch, lantern, or smaller, and attempts to counteract magical light with a +12 counteract modifier.
The umbral drake can't use Shadow Breath again for 1d6 rounds.