Boss Monster the Dungeon-Building Card Game Wiki

Minibosses are a new concept found in the Rise of the Minibosses expansion pack.

While Minibosses are included in the Room deck,they are not Rooms. Instead, Minibosses enhance theRoom they are built under and can gain more enhancements via the promotion mechanic.

During the build phase, you may build a Miniboss instead of a Room. Place it face-down over the Room you want to modify. If a Room with a Miniboss is destroyed, discard the Miniboss.

When you reveal a Miniboss,you must pay one (c) or it is discarded from play. Attach the Miniboss under its Room so only its Level One power is showing (see back cover). Your Room now has that ability text.