Malortis
Malortis, the Portal Master is a daemon of occasional service to the ritual summoners of Mhaldor, able to ferry beings to and from the Inferno, for the right price. For instance in 535 AF his dread assistance was purchased by the Blood Congregation in tricking the daemon generals Bistande, Takranix, and Dilortum into plagueing Cyrene with hordes of daemons.
In 641 AF the House of apostates bartered with Malortis again to bear a Mhaldorian army to Hell to slay the upstart forces of the daemon general Malkulor who had been testing the defences of the City of Evil for several years in his revolt against Sartan.