Object

An object is anything that is not a creature: a weapon, a door, a wagon, a chair, a stone wall, a flame, a rope, a coin. Objects are inanimate by default — they can be targeted, damaged, moved, and destroyed, but they do not roll initiative or take actions of their own.

Object stats:

• AC: Most objects have AC based on material (cloth 11, wood 15, stone 17, iron 19, mithral 21, adamantine 23)
• HP: Determined by size and material; a small wooden object might have 5 HP, a large stone wall hundreds
• Immunities: Inanimate objects are immune to poison and psychic damage, and they make no saving throws unless an effect specifies that objects can save (e.g., shatter)
• No vital systems: Objects don't have a Constitution score, can't be charmed, frightened, paralyzed, etc.

Targeting objects with spells:

• Some spells target "a creature or object" — these can affect objects directly
• Spells that target "a creature" cannot affect an object unless its description says otherwise
• A held or worn object is generally not a valid target if the creature holding it is not — the holder gets to make the save on its behalf at the DM's discretion

Magical objects:

• A Magic Item is still an object, but is often immune to mundane damage or has higher thresholds
• A magical effect on an object (a Bless on a sword, a light cantrip) ends when the spell ends or the object is destroyed

Animated objects: A creature that uses an object's statistics (a flying carpet, an animated armor) is treated as a creature, not an object, for the duration of its animation.