Sweeping Soothing

Tap all creatures target player controls. If Sweeping Soothing was not cast from your hand, those creatures don't untap during their controllers' nest untap step.
Hex {1}{u}{u} (You may cast this spell as a face-down 2/2 creature for {3}. You may turn it face-up and cast it at any time by paying its hex cost.)
Flashback {4}{u}{u} (You may cast this card from your graveyard for its flashback cost. Then exile it.)