Amulet of Chernobog

The amulet of Chernobog is a piece of stone inserted into a pendent. A very bland piece of jewelry that consist of basic iron chain and an iron head holding the grey stone.

When you use this amulet, you become and enter a shadow. You are undetectable while in this form except for inside of creature's shadows. Your size can shrink down as need to move between shadows, but can never grow.

Your speed while in this form is 60 ft.

Light becomes an impassable obstacle while in this form. If a shadow you are in ever gets destroyed by light, you are thrown out of the shadow. If you are removed from the shadow in a space two sizes smaller than you, you die. 

While in a creature's shadow, they experience a chill and a feeling of added weight. 

Once per use of this ability, you can mark a creature while inside it's shadow. The target must succeed on a dc 13 wisdom saving throw or become cursed. While cursed, if the creature enters total darkness, they will be attacks by a greater shadow. This effect stays on them until the remove curse spell is used on them. 

Notes: Immunity: All, While charged the stone in the necklace becomes completely black. , You must have a connection to Chernobog who allows you to attune to this item.