Creepers are common hostile mobs that will explode when close to a player. They have 20 health points, they spawn in light level of 7 or less and they commonly drop gunpowder. Creepers will chase after any player, as long as within a 16 block (+5%) radius and +4 block vertically. The detection range of creepers is reduced to half of their normal range (8 blocks) when the player is wearing a creeper mob head. Creepers naturally spawn in the Overworld on top of solid blocks with a light level of 7 or less.