Totems of Undying are special items in the game Minecraft that allow players to avoid death. When a player holding a totem takes lethal damage, the totem activates, preventing death and restoring some health instead. This gives players a second chance in dangerous situations. To obtain a totem, players must defeat Evokers, a type of hostile mob found in Woodland Mansions or during Illager raids. Once defeated, the Evoker drops a totem, which can be held in the player's hand or inventory for use in emergencies.