Fire continuously with both guns
Endless Waltz is an ability for King that requires 3 AP and is available at level 12. King fires continuously with both guns until either the ability gauge runs out or he needs to reload.
Endless Waltz: AG ↓ requires 6 AP and is available at level 19. It reduces the AG cost of Endless Waltz.
Waltz, from German: "Walzer", is a ballroom and folk dance, normally in triple time, performed primarily in closed position.