When Liek sought Andrew for a deal, he specifically set up a magic barrier for sound insulation.
Perhaps because no one else knew about the "Blood of the Fire God" in his possession.
Maybe his reason for coming to the Outer Battlefield was to protect his secret, rather than solely to test himself.
In any case, he soundproofed it.
The "Desolate Language Series Magic" is magic of language, also about sound. Therefore, in soundproofing, it's nearly invincible.
However, Andrew's voice seemed to disregard the opponent's soundproof measures, penetrated the sound insulation barrier, and subsequently… resonated throughout the venue!
"I never intended to be a traitor."
"Your proposed deal is rotten."
Upon hearing Andrew's words, everyone present reacted similarly: "Has this kid gone mad? Doesn't he care for his life?"
