Minecraft 1.21.5, the "Spring to Life" update, brings a vibrant refresh to the Overworld. Discover new mob variants based on biome, ambient sounds, and decorative blocks like Firefly Bushes, Leaf Litter, and Wildflowers. Wolves now have unique sound profiles, and spawn eggs feature improved visuals. Fallen trees add natural variety to landscapes. Sheep wool color depends on biome, and camels spawn in deserts. The update also enhances technical tools, including an accessible Game Test system for creators.