Druid Class (AFR) from Adventures in the Forgotten Realms, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Svetlin Velinov
• Card Text:
  (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.