Boardgamegeek https://boardgamegeek.com/boardgameexpansion/313901/blood-bowl-2016-edition-underworld-creepers-underw
Anglais - Mixed hybrid teams are legal again under NAF rules, formed from a mix of different races and cultures. Skaven and Goblin teams are affectionately called the Underworld Denizens, and the Underworld Creepers are one of the most popular examples. The combination of players from both races joins the best of both worlds, spawning new strengths and eliminating old weaknesses to create something greater...