The blood of the Sirens dyed the sea red, but due to Lis's Spell, this area had temporarily become a dead zone.
He carefully maneuvered his Longsword, extracting the vocal cords from the remaining four Sirens.
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[You have killed a Shallow Sea Siren (LV51)!]
[You have gained 210,000 Experience Points!]
[You have killed a Shallow Sea Siren (LV52)!]
[You have gained 220,000 Experience Points!]
...
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A total of five Sirens, Lis had gained over a million Experience Points.
The strength of the Sirens wasn't much, they didn't stand a chance against a stronger opponent, and the Experience Points they provided were relatively low.
After Lis finished, he returned directly to the "Mermaid."
The Sirens had been dealt with by Lis, and naturally, their singing had stopped long ago.
