It looks like Wizards of the Coast decided to give Detention Sphere a body. Well, good for them and good for us because it is a lot more fun to play Deputy of Detention than Detention Sphere.
Many will remember how much trouble the infamous Reflector Mage created for opponents. Now it's time for them to deal with Deputy of Detention, which is no less dangerous.
The only downside is that it does not have a Human creature type, so it can't be used to maximum effect in the Humans deck. But it will do just fine in any other list that utilizes both white and blue mana.