Parallel drainage pattern. A parallel drainage system is a pattern of rivers caused by steep slopes with some relief. Because of the steep slopes, the streams are swift and straight, with very few tributaries, and all flow in the same direction.
1 In Creative, the player can use spawn eggs to spawn most mobs. 2  When mobs are spawned this way, all normal spawning requirements, such as light level and block type, are ignored. 3  Any entity can be spawned using the /summon command.
1 Even though hostile mobs spawn in light levels 7 and lower, and thunderstorms are in light level 8, they will still spawn because it is dark enough. 2  Rarely, a lightning bolt can emit a light that is lower the light level 5.  Charged Creepers can sometimes, rarely, light up as the same level as a Redstone Torch.