Potion Siege

Brew, merge and defend: living potion bottles hold the castle wall against a clockwork army. Summon potions onto the wall, merge two of a kind into a stronger one, and pick a skill card at every upgrade to build your defence. Fire, ice, lightning and more each fight their own way, and every chapter ends with a clockwork boss. Clear the story stages for stars, unlock hard modes, or see how long you last in endless mode.