Begin by breaking the white chocolate into smaller pieces and placing them in a microwave-safe bowl. Microwave on low power for 30 seconds at a time, stirring well in between until melted and glossy, about 1-2 minutes.

Line a baking sheet with parchment paper. Pour and spread the melted white chocolate evenly onto the prepared baking sheet, creating a layer about 1/4 inch thick.

Coarsely chop the Halloween Oreos into smaller pieces and sprinkle them over the melted chocolate, ensuring they are distributed evenly.

Sprinkle the Reese's Pieces onto the chocolate, followed by Halloween sprinkles and eyeball candies. Press down gently to ensure they stick.

Place the baking sheet in the refrigerator for about 1 hour to allow the chocolate to set completely.

After an hour, break the chilled bark into irregular pieces of your desired size.

Transfer the broken bark to a decorative dish or container. Store leftovers in an airtight container at room temperature for up to a week.