Thread:BlitzerRyuusei/@comment-25090143-20141219020334/@comment-25316201-20141219022537

That person is wrong, there are no limits to how many ARTS a player uses during their Attack Phase - ARTS Step.

http://www.takaratomy.co.jp/products/wixoss/rule/rule_FAQ/faq_06_05.html

Translation: "ARTS with [Attack Phase] Use Timing may be used during the Attack Phase's ARTS Step during your turn or your opponent's turn, there are no restrictions to how many you use."

For clarification purposes, you cannot "counter" ARTS during the Attack Phase - ARTS Step. That is: you, the attacking player, may use however many ARTS you like upon entering the Attack Phase; and your opponent, the defending player, may use however many ARTS they like after; however, you cannot use another ARTS after, because your ARTS Step has finished.