(Gain the next level as a sorcery to add its ability.)
Whenever a land enters the battlefield under your control, you gain 1 life.
2G: Level 2
You may play an additional land on each of your turns.
4G: Level 3
When this Class becomes level 3, target land you control becomes a creature with haste and "This creature's power and toughness are each equal to the number of lands you control." It's still a land.

NOTE: Stock image, not actual card.