Expansion pack #7 lets you solicit help from the underground. The underground is not that concerned with who you are, though — or who this enemy is you keep mentioning.

This expansion introduces new ways to interact with the enemy, has 2 cool new Units, and 2 cards that care about things blowing up.

Dubious

See? Just some friendly folk with a helping hand. No Questions Asked is a Tier 1 Event card, so you can use it right away on the first turn of the game to kick-start your strat! It's basically all upside. Trust me.

Radical

These guys have no pretense of helping you, they're just here to see stuff blow up. Just point them north on the map and watch the fireworks!