Ghasts are hostile mobs found in the Nether dimension of the game Minecraft. They are large, floating creatures with a ghostly appearance, characterized by their white, cube-shaped bodies and large, expressive eyes. Ghasts can shoot explosive fireballs at players, making them a significant threat in the game. When defeated, Ghasts drop Ghast Tears, which are valuable items used in crafting and brewing. They spawn in the Nether in open areas, particularly in the Soul Sand Valley biome. Players often need to strategize to avoid their attacks while trying to defeat them for their drops.