Meserole the Marauder is a zergling mercenary brood commander. It offered its services, along with those of its brood and especially its Plague Bringers, to Infested Stukov when he was hiring mercenaries to destroy some of his enemies.
Many zerg ground units may burrow, rendering themselves invisible but incapable of moving or attacking.
2001-01-31. StarCraft: Brood War. Vivendi Games. Mission: Mercenaries II (in English). Map Archives: Mercenaries II