This is a newer, playable, SnowsEnd Mountains yeti expansion. There are 4 squares with connecting bridges, 3 yetis, an ice spider and a snow spider. This version is more playable with a snowdrift yet civilized look to yeti life. The fury folk choose to live in caves but also build with snow and ice. They have no written or spoken language and choose simply to use body language along with tribal totems and monuments.
Nice design, looks close to a real Lego produced set. My only criticism (and that only applies if you were intending to produce something that looked like a Lego produded set) is that the cave is very solid compared to the rest of the Heroica line, if you could get the same shape but with half the bricks then the fit would be better.