As Alex was discussing with Olivia, he suddenly felt a hot sensation at the center of his forehead. He knew what that sensation was. That was the sensation of critical danger, produced by the danger-signaling treasure at the center of his forehead.
Although his hearing ability was on, it didn't pick the sound wave generated by anything piercing through the air. Not dilly-dallying, he grabbed Olivia by her hand and pulled her towards himself. Now holding her by the waist, he leaped high into the air and far away in a random direction since he couldn't say it was this particular direction the attack was coming from.
A few moments after he jumped away, the spear that was launched, since there was no one to impact, continued onward into the distance, soundlessly.
When he landed, he quickly loosened his grip on Olivia's waist.
"An invisible attack was launched at us a few moments ago." Alex quickly said, trying to explain to Olivia why he did that.
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