Spawning Pool (Foil) (ULG) from Urza's Legacy, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Foil
• Artist: Rob Alexander
• Card Text:
  Spawning Pool comes into play tapped.
  T: Add one black mana to your mana pool.
  1B: Spawning Pool becomes a 1/1 black creature with “B: Regenerate this creature” until end of turn. This creature still counts as a land.