A massive force is heading towards your castle, and only a wall and some elementals stand in its way.
Combine the same fighters to make them stronger and unlock new elements: from fire, water and earth to wind, lava and nature, and then to ice, energy, spirit and sandstorm. There are twelve elements in total, each with its own abilities: some burn areas, others slow down the enemies or eliminate specific targets.
Between attacks, upgrade your magic and choose three spells to take into battle: fireball, frost storm, chain lightning, meteor shower or dragon call.
The campaign is endless, taking you through various worlds: swamps, snow peaks, desert tombs, fungus forests, lava infernos, voids and meadows. Each world has ten waves, with a boss at the end. Your army and gold carry over between worlds, ensuring that your progress is always saved.
There are chests, keys, scrolls, castle upgrades and daily rewards to discover. You can save your progress in the cloud and continue playing on a different device.
Merge Elementals: Castle Defense combines merging, tower defense and strategy in one game. It's free to play, no download or sign-up required.
How to play
Place identical elementals on top of each other to merge them: two creatures of the same type and level combine into a higher one. You can only purchase the first tier with gold; everything else is achieved through merging. Keep in mind that space on the grid is limited, so plan your combinations carefully.
When your troops are ready, press Start Wave. During the battle, merging is disabled: your fighters will automatically aim and shoot, while you need to cast spells timely to protect the wall. Each defeated enemy drops gold.
After the wave, you return to the preparation phase: buy new units, rearrange them, and upgrade. The final wave of each world features a boss battle, and after defeating it, you'll move on to the next biome.
If the wall falls, you can revive right away using gems and continue the game.