Choked Estuary [Warhammer 40,000]

Rarity: Rare As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped.
T : Add U or B. Centuries' worth of black iron lie beneath the soil of every Imperial world, their civilization built on never-ending strife.