The guardian is virtually identical to its StarCraft counterpart, a slow-moving but long range aerial siege flyer. It appears as one of the zerg breeds in the Amon Brood in the Legacy of the Void campaign and as a feral zerg breed in Nova Covert Ops.
Guardian gain +3% hit points, +1% attack speed and +1% Biotic Leech per stack of biomass.
(Heal 1% hit points per 1 biomass)
The amount of collected biomass variable on difficult and the amount of supply, consumed by the killed enemy unit:
Collect 5 biomass per supply (casual and normal)
Collect 4 biomass per supply (hard)
Collect 2.5 biomass per supply (brutal)
Biotic Leech:Guardian heal themselves for 1% of the damage they deal per stack of Biomass