They barely had enough time to create a safe enough distance to evade the attack. The monster had shot it out so quickly that it was almost impossible to avoid. If Vyn hadn't stepped in to block the attack, it was undeniable that something catastrophic would have occurred. The deadly poison would have caused unimaginable destruction.
They had been fighting the Mosslurker for an extended period, but it hadn't used its ultimate attack all throughout the battle. It seemed like they were going to defeat it without experiencing its full power. But right at this moment, it suddenly decided to make its move.
The timing was unexpected and caught them off guard. Now, thinking more about it, it seemed this monster had actually acted that way on purpose, making them drop their guard. But when did Mosslurkers become sentient creatures? They were generally creatures who acted purely on instinct. It was indeed strange and unsettling.