Reverie of Enlightenment

When Reverie of Enlightenment enters the battlefield, choose a player.
Whenever the chosen player casts a noncreature
spell, target noncreature permanent you control
becomes a 3/3 blue Octopus Nightmare in
addition to its other types and colours.
Wake — {3}, tap 3 creatures. (Any player may activate this ability. If they do, you sacrifice this permanent and draw a card.)