The Queen of Air and Darkness

Her strong enchantments failing,
  Her towers of fear in wreck,
Her limbecks dried of poisons
  And the knife at her neck,

The Queen of air and darkness
  Begins to shrill and cry,
`O young man, O my slayer
  To-morrow you shall die.'

O Queen of air and darkness
  I think 'tis truth you say,
And I shall die to-morrow;
  But you shall die to-day

From Last Poems by A.E. Housman