Blobbers create damaging goo tiles; push them into water or kill them quickly to prevent map saturation. Scarabs burrow and emerge, making them tricky to predict; try to block their emergence points or use area-of-effect attacks. Ice tiles cause units to slide one extra tile in the direction they were pushed; use this to your advantage to push Vek further or into hazards, but be careful not to slide your own mechs into danger. Lightning rods can be activated to deal damage to adjacent Vek.
