You could go for 2 levels of Wyrm Wizard no sooner than at the effective wizard levels of 17 and 18 to gain miracle as an arcane spell on your wizard class spell list.... and work it into whatever schemes you got going on.
Normally, this is what I would do for a Shadowcraft Mage build, since it doesn't rely on the Arcane Disciple feat and an alignment matching a deity with the Luck, Hope or Zeal domain.