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Song of Devastation

       Usage: cast 'song of devastation' <target> : cast 169 <target>
      Damage: Max of (10 + level/20)d10 + 250 or percent of max hit
        Save: None
        Cost: 50 + level*0.11
    Duration: Instant
Casting Time: 20
      Target: One MOB or character

The classes that get the spell song of devastation are:

bard       : Level 107 (excellent)