Incorporating the elements of a "cute ghost," a "purple" color palette, a "black background," and a "professional" aesthetic, this artwork on ArtStation emerges as a captivating and trending masterpiece. With a skillful use of a "black gradient" and "high contrast" techniques, the adorable ghost takes center stage, exuding an endearing charm that is bound to capture hearts.

Set against the deep obsidian backdrop, the playful spirit, bathed in a soothing gradient of enchanting purples, emanates a mesmerizing aura. The transition from the darkest blacks to the luscious purples highlights every intricate detail of this professionally crafted apparition.

The artist's mastery is evident in the ghost's expression, which strikes a balance between ethereal innocence and mischievous delight. With its large, sparkling eyes and a subtle, friendly smile, the cute ghost beckons viewers into its supernatural realm.

As one navigates through this enchanting artwork on ArtStation, it becomes apparent why it's a trending sensation. The fusion of the "purple" and "black" elements in a "high contrast" manner brings forth a visually arresting composition that demands attention. Its professional execution showcases the artist's prowess, making it a standout piece in the art community.

In summary, this captivating artwork featuring a "cute ghost" on a "purple" and "black gradient" background is the epitome of professional artistry. Its "high contrast" elements and flawless execution make it a trending sensation on ArtStation, captivating the imagination with its otherworldly charm and attention to detail.