Berserker is a 4-strength Close Combat unit. Its trick is transformation: when a Mardroeme card affects its row, it turns into Vildkaarl, a 14-strength unit with Morale Boost. Keep Biting Frost in mind, though: it drops every non-hero unit in Close Combat to 1 strength, on both sides.
It comes in the basic Skellige deck that Count Martin Monnier hands you at The Pheasantry in Beauclair when you sign up for the tournament or start Gwent: Never Fear, Skellige’s Here. Only one copy exists. This is a Blood and Wine card, and the Skellige deck is the one you need for the Beauclair tournament.
