Toph, Hardheaded Teacher

{2}{R}{G} - Legendary Creature — Human Warrior Ally - When Toph enters, you may discard a card. If you do, return target instant or sorcery card from your graveyard to your hand.

Whenever you cast a spell, earthbend 1. If that spell is a Lesson, put an additional +1/+1 counter on that land. (Target land you control becomes a 0/0 creature with haste that's still a land. Put a +1/+1 counter on it. When it dies or is exiled, return it to the battlefield tapped.)