Angus' decision to let the guardian captain go is not just on a whim. Using his large-scale perception, he knows some other guardian groups are approaching their area. He also knows the sixth-grade captain is not easy to take down frontally in a short time.
He didn't believe someone with a weapon artifact and strong magic armor had no other hidden card as a last resort. In the end, Angus chose to let the captain go. Still, it is not without any precaution.
When the guardian fights against Angus, he already orders Cupid to spread his odorless fire-ice poison gas into the surroundings. As a Giant Salamander that relies on poison as its main weapon, Cupid creates various poisons, from harmless to deadly.
With the help of [Allegiance], Angus manages to force Cupid to reveal all its poisons during their travel. The odorless and colorless fire-ice poison is not strong. Still, if someone inhales too much, it will leave irreparable damage to the body.
