Assault Counter, or AC for short, is a battle feature characteristic to the Linear Motion Battle System versions present in Tales of Xillia and Tales of Xillia 2. It is based on the concept of Chain Capacity, but instead of each arte having a different AC cost, every arte costs 1 AC to execute; therefore, Assault Counter governs the length of the arte chain each character can execute. AC is also expended when performing normal attacks and quick-stepping.