Format:
cast 'lethargy' <target>                cost: 20 mana

   The lethargy spell is a high level cleric spell that requires high
intelligence and wisdom to cast successfully.  If successful, the target is
trapped in a bubble of slow time.  This hinders the ability to fight, flee,
or defend yourself.  It also hinders regeneration and the wearing out of
protective spells.

This spell automatically initiates combat when successful.  The target is
allowed less of a saving throw compared to spells like summon and charm.