Weeping Angel

False Appearance: While the Angel remains motionless, it is indistinguishable from an inanimate statue. 

Petrifying Red Light Green Light: While a creature observes the angel without blinking, it gains the petrified condition and cannot move or attack. While in this state its resistances become immunities and gains all the effects of a petrified creature. A creature can use his or her reaction to cast out a 60 ft cone with his/her sight and any angel caught in the cone will be petrified on its next turn. After 5 uses of this ability, the creature must make a Constitution saving throw with a DC of 5 to succeed on each subsequent turn. This DC increases by 5 each time it is attempted up to a maximum of 20. The area of this ability is halved if the creature is in low light (without darkvision) and cannot be used by a blinded creature, creatures relying on blindsight to see, those in complete darkness, undead or constructs.

Pack Tactics: The Angel has advantage on attack rolls against a creature if at least one of its allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack: The Angel makes two attacks: one with its bite and one with its claws or can use its aging touch instead.

Bite: Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d10 + 2) piercing damage.

Claws: Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d10 + 2) slashing damage.

Aging Touch: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) necrotic damage and the Angel regains hit points equal to the damage done. The targets maximum hit points are lowered based on the necrotic damage done and the character ages a number of years equal to the damage of the attack. The lost hit points are restored after a long rest but the additional years of age can only be restored by a greater restoration spell or similar magic. Each time a character suffers a aging touch that takes them above a venerable age (e.g. 70 with humans) they gain a level of exhaustion and after gaining 5 levels the victim dies and turns to ash.

Careful Gaze:  While not petrified and working with other Angels, the Angel can use its reaction to ensure that it doesn't look at another Angel and If two angels fail to use their reaction and look at each other then they remain petrified until something breaks the line of sight such as a Darkness spell.

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