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.
Spawning [edit | edit source]. Skeletons can spawn almost anywhere in the Overworld at a light level of 7 or less. In the Nether, they can also spawn in nether fortresses at a light level of 7 or less in place of a wither skeleton. Spiders rarely spawn with a skeleton riding them, creating a spider jockey.