Taken from Gods Eater Burst's database:
A fallen Zygote brimming with highly flammable poisonous gas. As this poison can weaken the bond of Oracle Cells adapted to the body, the power of a Gods Eater is temporarily weakened if inhaled.
If attacked by other Aragami when one's defenses are down, one could be incapacitated instantly. It might be safer to take this one out with gunfire, even if it takes more time.