Merge Elementals: Castle Defense

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🏰 The horde is marching on your castle. All that stands in its way is a wall and a handful of elementals. 🔥💧🌍 Merge identical fighters to push them up the tiers. Fire, water and earth cross into wind, lava and nature, which cross again into ice, energy, spirit and sandstorm. Twelve elements: some burn an area…