Tremor spell:
Syntax: cast 'tremor'                                   (Cleric Level 15 Spell)

This spell inflicts damage on every creature in the room.  Beware that
other creatures who are not yet fighting may attack you as a result!  As
the cleric gains in levels, Undurga the Earth Lord responds ever more
strongly.  (Min Mana = 20)

See Also: Blasting Spells (list of offensive, damaging spells)
          Area Spells     (area affecting blasting spells)
          Arctic Blast    (high level cleric area spell)