Strong chests (merge for Powerful chests) give you evergreen trees and statues. Spirit chests (merge for Chest of souls) give you floating rocks, glowing plants, and ponds/puddles. Fighter chests (merge for Hero chests) give you ancient trees and mineral rocks. Queen chests (merge for King chests) give you stumps and monoliths. Humble chests(merge for Noble chests) give you life flowers and bushes.