Phosphorous Filiavents are minor enemies in Xenoblade Chronicles X. They are members of the Filiavent family, and can be found at level 51-60 in the White Phosphor Lake in Cauldros. There are only three of them, but they can prove very difficult to defeat as they cannot be fought effectively in Skells or at ground level, and are kindred monsters - attacking one will cause the other two to attack alongside it. They are also Hidden enemies, and cannot move.