Tesseract monoliths are the static defensive option for Zeratul in Co-op Missions. They serve as a calldown option once Zeratul has found the first artifact fragment. Tesseract monoliths deal low damage, but stun enemies in an area for a short time. When summoned, tesseract monoliths are permanent. With artifact fragments they can be upgraded to protect themselves with a Shade Barrier and relocate their weapons and shields for 60 second with Shade Projection. They are called down from the top bar, can store three charges, and each charge has a 180-second cooldown.