Foras or Forrasis, in demonology, is a powerful president of Hell, being obeyed by twenty-nine legions of demons.
He teaches logic and ethics in all their branches, the virtues of all herbs and precious stones, can make a man witty, eloquent, invisible, and live long (invincible according to some authors), and can discover treasures and recover lost things.
The Latin Pseudomonarchia Daemonorum says of him: Forras vel Forcas magnus Præses est: visitur forma viri fortissimi, & in humana specie vires herbarum & lapidum preciosorum [sic] intelligit.
Reddit hominem invisibilem, ingeniosum, loquacem & vivacem: amissa recuperat, thesauros detegit.
[Forras and/or Forcas is a great governor: he is visited in the form of the strongest man, and in human appearance he understands grasses' and precious stones' powers.