Super Cognition, immediately reducing the cost to 2 blue energy, but Gifts From Above, Decoy, and Magic Tuna work as well. This is a powerhouse creature if you can get it out early, but if you get to the late game you can do a lot worse than an over-priced 5AP/5HP creature. What else are you going to spend energy on at that point anyway? It's a win-win situation!
Strong against: weak allies, lack of defending allies.
Weak against: lack of cards drawn or energy, miscalculations, Killer Wave.