Boss Monster: Vault of Villains

It's a miniboss mini-expansion!

Vault of Villains allows you to power up your rooms with minibosses, payable and promotable minions that make rooms stronger and stronger!

Includes 15 minibosses (enough for any Boss Monster base game) and enough coin generating rooms to keep them paid!

Also includes 5 new bosses and 8 new spell cards.