When a player successfully trades with a villager or when a villager's stock has become updated [requires testing] Villagers now have different skins determined by biome (which includes swamps and jungles, which do not incorporate villages) in addition to professions. Having said that, villagers spawned in igloo basements nevertheless https://financefeeds.com/doge-and-sol-surge-toward-new-highs-but-why-are-investors-betting-big-on-this-defi-coin/