Elder of the Air Nomads

When Elder of the Air Nomads enters the battlefield, Learn. (You may reveal a Lesson card
you own from outside the game and put it into your hand, or discard a card to draw a card.)

Other Airbender and avatar creatures you control cost {1} less to cast and have, Whenever this creature deals combat damage to a player, learn.

"You're playing games with him. The avatar should
be training."