I like Expanded
Mismagius is basically the successor to XY Gourgeist, but better in multiple ways. Decent ability, 90 HP means you can search both it and it's prevolution with Level Ball, and Rescue Carrier can get the entire evolution line back... and in Expanded you can evolve it immediately with Dusk Stone, and stack a ton of residual damage with Odd Cemetery, Spell Tag, and Horror Psychic Energy.