Shadow Mastiff
Source: Mordenkainen Presents: Monsters of the Multiverse p. 215, Volo’s Guide to Monsters p. 190

Shunning sunlight, these hounds are usually met as a pack. Some faiths devoted to deities of gloom and night, such as that of Shar in the Forgotten Realms, perform unholy rites to summon shadow mastiffs to work as temple sentinels and bodyguards.
Shadow Mastiffs
Shadow mastiffs—hounds of the Shadowfell—move invisibly through the shadows, always on the hunt.
Statblock
title: Shadow Mastiff

*Medium monstrosity, Typically Neutral Evil*
- **Armor Class** 12
- **Hit Points** 33 (`6d8 + 6`)
- **Speed** 40 ft.
|STR|DEX|CON|INT|WIS|CHA|
|:---:|:---:|:---:|:---:|:---:|:---:|
|16 (+3)|14 (+2)|13 (+1)| 5 (-3)|12 (+1)| 5 (-3)|
- **Proficiency Bonus** +2
- **Saving Throws** ⏤
- **Skills** [Perception](Mechanics/CLI/rules/skills.md#Perception) +5, [Stealth](Mechanics/CLI/rules/skills.md#Stealth) +6
- **Senses** [darkvision](Mechanics/CLI/rules/senses.md#Darkvision) 60 ft., passive Perception 15
- **Damage Resistances** bludgeoning, piercing, slashing from nonmagical attacks while in dim light or darkness
- **Languages** —
- **Challenge** 2
## Traits
***Ethereal Awareness.*** The shadow mastiff can see ethereal creatures and objects.
***Sunlight Weakness.*** While in bright light created by sunlight, the shadow mastiff has disadvantage on attack rolls, ability checks, and saving throws.
## Actions
***Bite.*** *Melee Weapon Attack:* `+5` to hit, reach 5 ft., one target. *Hit:* 10 (`2d6 + 3`) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked [prone](Mechanics/CLI/rules/conditions.md#Prone).
## Bonus Actions
***Shadow Blend.*** While in dim light or darkness, the shadow mastiff becomes [invisible](Mechanics/CLI/rules/conditions.md#Invisible), along with anything it is wearing or carrying. The invisibility lasts until the shadow mastiff uses a bonus action to end it or until the shadow mastiff attacks, is in bright light, or is [incapacitated](Mechanics/CLI/rules/conditions.md#Incapacitated).Environment
forest, hill, swamp