Warhammer 40k Conquest LCG: Jungles of Nectavus War Pack

Warhammer 40k Conquest LCG: Jungles of Nectavus War Pack - Rules of Play says:

Jungles of Nectavus is the first War Pack in the Death World cycle. Here, every faction enters the jungles of Nectavus VI, and you’ll need to embrace new tactics to survive in such a hostile environment. On this world, drawing attention to yourself can be a death sentence, so a new keyword allows you to deploy your cards secretly, only revealing them as the battle is about to begin