Guldo

Guldos are an enemy species in Xenoblade Chronicles 2. They are humanoid zombie-like creatures embedded with Core Crystals. Guldos have the unique ability to absorb a 's element during battle.

Xenoblade Chronicles 2
Guldos are found exclusively in the Land of Morytha. Two types of Guldos can be found, a smaller type and a much bigger type that is fought exclusively as a boss and quest-exclusive enemy.

The Architect reveals that the Guldos were originally human survivors from his world. It is hinted that they were implanted with the technology that later led to the creation of Core Crystals, intended to replace their brain cells, so as to attain immortality. This resulted in them mutating into horrible abominations after the experiment with the Conduit.