¿Nunca le ha pasado que está simulando repetidas veces el ataque a un objetivo y, de pronto, el objetivo desaparece?
Eso es porque ha terminado su tiempo de vida (o el ataque de otro jugador) y el objetivo ha desaparecido, por lo que se cierra el simulador y aparece un mensaje indicando "El objetivo ha sido destruido".
Esa es otra de las mecánicas del juego (no una regla).
---
Has it never happened to you that you are repeatedly simulating the attack on a target and, suddenly, the objective disappears?
That's because his life time (or another player's attack) has ended and the target has disappeared, so the simulator is closed and a message appears stating "The target has been destroyed."
That is another of the mechanics of the game (no one rule).