The Shadow Blot is a mixture of paint and paint thinner and the main antagonist in Epic Mickey.
Mickey Mouse accidentally spilled some Thinner and the Blot released him into Wasteland. Then, when he is in Wasteland, Wasteland is taken by the Shadow Blot.
Mickey must redeem or defeat the Blotlings, destroys the blisters with paint and note, there are Lost Characters. To defeat the Blot, Mickey must destroy all the blisters with Paint or Thinner, as these are Bloticles.