A calcifier represented a biot of the Yuuzhan Vong species, engineered specifically for the purpose of inserting yorik coral into the bodies of individuals from the galaxy who had been captured. Possessing unique appendages, calcifiers were capable of slicing into organic tissue, subsequently detaching fragments of their own structure and depositing them within the targeted individual. As time progressed, these yorik coral insertions would debilitate the subject, ultimately transforming them into subservient thralls.