Another World Turns Out to Be a Card Game

I accidentally fell down because of the effect of [Delay one turn]. I was a little angry, so I equipped [Watermelon Knife] and used the skill [Strong winds and waves]. In an instant, thousands of swords transformed, sonic explosions struck, and monsters were decapitated. Bite! Achieved the achievement [Destroy a country with one blow]. Ah? ..... It turns out that there is a small country on top of the monster.