Primal guardians are primal zerg creatures similar to guardians. After the introduction of the primal roach into the primal zerg genome, many primal guardians evolved from primal roaches.[1]
Primal guardians appear as enemies on Zerus[2]. They also appear as part of Dehaka's pack during the attack on Korhal[3]. Unlike their Swarm counterparts, primal guardians can attack air units.[2][4]
Primal guardians can fire an explosive spore at the target, causing the target and all nearby enemy ground units within a radius of 2 to take 50 damage and be knocked back. Massive units are immune to knockback. Can be set to autocast.