Douluo Card Assistance

Are evil soul masters necessarily evil? Do evil soul masters have to be slaughtered? But now, an evil soul master whose martial soul is a card picked up his three cards. The transformation card turned him into a dragon knight holding a dark knight sword and riding a black dragon. The troop card allowed him to summon the Dark Cavalry class. The spell card allowed him to cast the spell Knight's Heart, which directly doubled the strength of his troops. The world card allowed him to lead the enemy into the dark abyss. (This book is a dark novel. The protagonist is not decisive in killing, nor does he kill innocent people indiscriminately. There is no system, and there are four martial arts spirits. Although the protagonist is powerful, he is not brainless. He can be easily obtained without strength. I don't like it, so don't criticize it)