Rampage constructs are NPC structures in StarCraft II: Legacy of the Void.
When the Terran Dominion, Daelaam, and Zerg Swarm took up assault positions around Amon within the void, he deployed numerous constructs of void energy to combat them. The rampage constructs were one such construct.
Rampage constructs spawn around the map, usually when the player is attacking a void chasm or void crystal. They attack by bombarding a large area with blasts of energy, dealing splash damage to all enemies. The best way to deal with them is to spread out your forces to avoid heavy losses, and use Kerrigan's Celestial Radiance to heal them during volleys.