Ancient ruins are randomly generated throughout the road map at the beginning of the game. Their only function is to obstruct the placement of defensive structures and the construction of the path towards the castle gate.
Players can remove ancient ruins but need to spend gems in order to do so. With each destroyed ruin the cost goes up as listed in the table to the right.
The Master Blaster quest offers some rewards for destroying ruins.
|Ancient Ruin||Removal Cost|