intriguer
1. [ noun ] a person who devises plots or intrigues
Synonyms: designer
Examples:

"he is believed to be the principal designer of the terrorist bombing attack"

Related terms: planner
Similar spelling:   intrigue
  intriguing
  intruder
  introitus
  intrinsic
  intricate
  interior
  Indriidae
  introvert
  intragroup
  intrinsical
  intertrigo
  interim
  in_turn