The stalker has advantage on attack rolls against any creature it has surprised.
Shadow Stealth
Trait
Hide
Rule
While in dim light or darkness, the stalker can take the Hide action as a bonus action.
Sunlight Sensitivity
Trait
Perception
Rule
While in sunlight, the stalker has disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight.
Multiattack
Action
The stalker makes two attacks: one with its claws and one with its tentacle.
Claws
Action
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) slashing damage.
Tentacle
Action
Poisoned
Condition
Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 9 (1d10+4) necrotic damage, and the target must succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Shadow Bolt
Action
Ranged Spell Attack: +5 to hit, range 60 ft., one target. Hit: 14 (4d6) necrotic damage.
Shadow Step
Bonus Action
The stalker magically teleports up to 30 feet to an unoccupied space it can see that is in dim light or darkness.
Uncanny Dodge
Reaction
When an attacker the stalker can see hits it with an attack, the stalker can halve the attack's damage against it.
Combat Behavior
Tactics
• The stalker uses its Shadow Stealth to hide and then attacks with surprise, using its Ambusher trait to gain advantage. • It uses Shadow Step to reposition and avoid melee, and to close distance on ranged attackers. • It focuses its attacks on the most isolated or weakest-looking target, using its tentacle to poison and weaken it. • If outmatched, it uses its Uncanny Dodge to reduce damage and retreats into the shadows.
Morale
The stalker is a coward at heart. If reduced to half its hit points, it will attempt to flee using its Shadow Step and Stealth.
Monster Description
A Gloomveil Stalker is a gaunt, shadowy aberration that hunts in the dark places of the world. Its body is covered in slick, dark chitin, and its face is a mass of writhing tentacles. It is a patient and cunning predator, using stealth and surprise to isolate and kill its prey.
Monster behavior
Gloomveil Stalkers are solitary hunters. They prefer to ambush lone creatures, using their Shadow Step to close distance and their tentacles to poison and weaken victims. They are fiercely territorial and will stalk intruders for days before striking.
Ecology
These aberrations are found in deep caves, ruined cities, and other places where darkness reigns. They feed on the life force of their victims, leaving behind drained and withered corpses. They are sometimes worshipped by cults that revere darkness and entropy.
History
Legends say that Gloomveil Stalkers were once creatures of the Feywild that were corrupted by the Shadowfell. They are ancient beings, and some sages believe they are the remnants of a failed experiment by a mad wizard to create the perfect assassin.
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