Cosmic Eclipse represents the final major Sun & Moon era release before the Pokemon TCG's shift to the Sword & Shield format. Released in late 2019, this set brought together beloved characters and Pokémon from across the generation, making it a nostalgic capstone for collectors invested in that block. The set remains popular for its mix of competitive playability and character-driven appeal during an era when the TCG was experiencing renewed mainstream interest. Silvally GX captures the synthetic Pokémon that served as Type: Null's evolution and key figure in Sun & Moon's narrative. The card's full-art treatment showcases Silvally's striking metallic design and technological aesthetic. Collectors appreciate Silvally's representation as a pivotal Pokémon from the generation, combining competitive utility with the character significance that makes this set enduringly collectible.