Stonespine Architects: INVASION | An Expansion That Packs a Punch!

About Stonespine Architects: Invasion, from BoardGameGeek:

You demonstrated your talent as a master of the ancient minotaur art of dungeon-crafting. Master Hortgully now tasks you with defending your dungeon and training a dangerous boss monster. Defeat the invading heroes, level up your monster, and prove your skill as a Master Architect. Stonespine Architects: Invasion is an expansion to the critically acclaimed card-drafting game for 1-5 players competing to construct the most dangerous labyrinth. Players deploy their boss monster and its minions to their dungeon at the end of each round to defend their expanding dungeon against invading heroes. The player to defeat the most heroes without letting any escape will be awarded a bonus, but all players will earn experience for their monster to unlock unique abilities and scoring opportunities. Spend gold between rounds to customize your labyrinth with monsters, traps, treasures, and secret passages. At the end of four years, the player with the most perilous dungeon will earn the title of Master Architect! -description from the publisher