3 Blue Spells:

I looked at these again, and do have some comments and questions.

Flying
I think you need to add the whole flying text to the card (takes leaving engagement attacks especially).  Flight currently lasts for the rest of the game unless the enchantment can be removed by some other sorcery or enchantment. Very powerful.  I can see the new / PW flying some Pummelroots around.

Train of Thought
In Magic, can you immediately play a card you've just drawn?
Since AotP has a 'play 3 cards' limit per turn, if the intention is to gain an extra card activation this turn, it would need to have that idea added. 
If it is just intended to help cycle through the deck, it is fine as written, though probably not worth putting into the deck, since it cycles cards but uses up one of your 12 card limit.

Telepathy
I think this needs to be discard after use.  If it lasts for the whole game, it is very powerful.
In a multiplayer game, if multiple opposing PWs are within 6 spaces, does get to look at the hands of ALL the PWs within 6 spaces?  In that case it really needs to be discarded at the end of the turn.

Telepathy - another way of doing this would be : Sorcery - Target Planeswalker's controller reveals their hand. One shot... nice and clean. Change Telepathy to "Read Mind" or something...

As you said, this is a very clean way to implement the .

buen aporte el ingenio de jace,saludos