Sub-Terra is a new environment for the Sentinels of Earth-Prime card game. It is a strange realm deep beneath Earth-Prime, where the Serpent People and the Morlocks engaged in a long and brutal war. It is a place of monsters, myths, and menaces spawned from both science and sorcery that makes an engaging battleground for your heroes and villains. This mini-expansion includes a unique 15-card deck and a divider that fits right in the core game's box. This deck is also 100% compatible with Sentinels of the Multiverse. Expand your Sentinels of Earth-Prime environment options with Sub-Terra!