Boardgamegeek https://boardgamegeek.com/boardgame/203719/krosmaster-arena-20
English - The World of Twelve is a little planet in the Krosmoz universe that is home to millions of warriors and adventurers who just want a simple life. However, life never stays simple for long as Demons from another dimension are always plucking up these warriors to fight in the arena for their amusement.
Official http://www.krosmaster.com/
French - Deviens le maître du Krosmoz ! Grâce à la nouvelle extension commune à dofus et Wakfu : Krosmaster.