Description from the publisher:
The space hulk Kaerux Erameas has landed on Sacaellum, and a host of Tyranids have caught the scent of blood.
Warhammer 40,000: Conquest – What Lurks Below is the fourth pack in the Planetfall cycle, and here you'll find cards that give new significance to planet symbols and invite you to fight for your faction's goals. This War Pack also offers a new Tyranids Genestealer warlord and his eight- card signature squad as well as fifty-one other cards to swell your armies. In What Lurks Below, every faction gains new ways to wage war and new reasons to fight.