Tide manipulator, Uncommon, 13b9g
Aqua, Unliving
Player(s) with fewest Aqua and Unliving cards suffers:
Bricks: -15
Wall: -15
Quarry: -1
This concept is problematic in that having it alone on hand gives you two points for its dual-keyword. Your opponent would have to have 3+ Unliving/Aqua to avoid receiving the effect. Combined with a Destruction or Brigand deck, this is an outstanding bargain.
Other cards that function like this have had their own keywords removed for balancing. That this one has two makes it ridiculously easy to deploy.