The cybernetics core provides upgrades for protoss aircraft and protoss cybernetic units. It also allows access to the advanced tech tree.
Within the cybernetics core are the necessary construction materials, automated factories and the mysterious essence translators that bond the spirits of fallen protoss to the cold metal exoskeletons of the dragoons. Eventually, by focusing through the Khala, the fallen warriors can control the movements of the quadrupedal dragoon as naturally as if they were within their former bodies.
Cybernetic cores are famed for their ability to blend machinery with biological beings and psionics through the use of advanced essence translators. Cybernetics cores also provide protoss commanders with the necessary auto-fabricators and materials needed to stage successful battlefield operations. The structure itself is equipped with flux dissipators, photon stabilizer arrays, and phase alignment amplifiers that give protoss warriors a decided edge on the battlefield where numbers are typically in the enemy's favor.
Sentries produce false copies of units to distract opponents. Duplicates have the same number of hit points as the original but take double the damage. The number of hallucinations created depends on the unit: gateway units spawn in twos, probes in fours, and all other units spawn one.
All protoss commanders can build a cybernetics core and research air weapon and armor upgrades at the cybernetics core. Karax, Vorazun and Fenix gain the ability to research warp gates from the structure. Alarak does not research air upgrades, instead researching upgrades for the havoc here. Fenix has the ability to research an upgrade for the conservator.