Help on spell greater ritual of chaos

Current upkeeper: Morpher
Casting time    : 66
Spell cost      : 1750
Spell type      : generic
Affecting skills: Demon lore, Summoning mastery
Affecting spells: Lesser ritual of chaos
This greater ritual allows a warlock  who is atleast  an Initiate of the First
Circle to try to summon a punisher  demon to serve the warlock.  The chance of
the ritual actually summoning a demon is slightly less than in the lesser
ritual due to the more powerful demon being summoned.

Greater healing sphere < List > Grip of death