Magic Resistance. Advantage on saving throws against spells and other magical effects.
Amorphous. Black moss can fit in small spaces of an inch or more without any disadvantage.
False Appearance. If motionless at the start of combat, the moss has advantage on its initiative roll. If a creature hasn’t observed the black moss move or act, that creature must succeed on a DC 18 Intelligence (Investigation) check to discern that the black moss isn’t ordinary fungus. It is not noticed with passive perception.
Surprise. If not discerned, the moss attacks with surprise. Creatures that are surprised can't move or take an actions on their first turn, and can't take a reaction until that turn ends. A member of a group can be surprised even if the other members aren't.
Spider Climb. The black moss can grow difficult surfaces, such as ceilings and walls, and can move along those surfaces without an ability roll.
Unusual Nature. The black moss doesn’t require normal food, or sleep.
Multiattack. The black moss makes three tentacle attacks in each 10' area where the moss grows. It can attack a single creature or multiple creatures within the area.
Tentacle. Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit: Target is grappled. The target can attempt to escape the grapple on it's next turn with a DC 14 escape roll (athletics or acrobatics) as a bonus or regular action (but not both).
Description
Black moss grasps and holds creatures, waiting for them to decompose into nutrients and liquid. It is often found in a symbiotic relationship with other creatures, particularly in damp subterranean environments, where it traps intruders and is fed and nurtured by intelligent creatures. The black moss has animal intelligence, and can therefore be trained to grow in specific areas and can be contained if tended.
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