Shifting Octopus

Bestow {4}{w}{u}(If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Flying
Enchanted creature gets +3/+3 and has flying.
When enchanted creature or Shifting Octopus becomes target of a spell or ability for the first time this turn, counter it.