Leader Unique Ability: Bà Triệu’s unique ability, “Drive Out the Aggressors,” provides additional Combat Strength for units fighting in Rainforest, Marsh, or Woods tiles; this bonus is further increased
· La Venta: your builders can make the Colossal Head improvement (provides +2 faith; also provides an additional +1 faith for every 2 adjacent rainforests or 2 adjacent woods, changing to +1 faith for every adjacent rainforest or wood upon reaching Humanism; provides tourism after researching...
That's an improvement over the vanilla Mine, right? Just as the Elven Cottage can be built in Woods, and is thus an improvement over the vanilla Cottage. Games often make 'improved' versions of gamepieces cost more than vanilla versions cost. Game players are certainly used to the concept...