• As if by magic, maybe
• As Poe might
• Hauntingly
• How haunted houses creak
• How something might be familiar
• How zombies walk
• In a chilling manner
• In a creepy way
• In a macabre manner
• In a macabre way
• In a spine-tingling way
• In a spooky manner
• In a spooky way
• In a strange way
• In a weird manner
• In a weird way
• In an odd way
• In an uncanny manner
• Mysteriously
• Spookily
• Uncannily
• With an air of mystery
• With chilling effect