Gives each vulture three spider mines. Vultures cannot replenish their supply of mines once expended. New mines may only be created with new vultures.
Mines burrow where deployed and are not player-controllable. Each mine causes 125 damage and has 20 hit points. Mines do not benefit from any upgrades. Air and hovering ground units do not activate mines. Mines can sense and attack nearby cloaked ground units such as ghosts or dark templar even without the aid of a detector. They will not, however, reveal cloaked enemy units. It is possible for ranged units to pick out the mines before being hit.