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 This is for those who have the Pretty Scary Update of Minecraft. 2  They spawn more with a full moon and not at all with a new moon. 3  Slimes can be found below level 40 in the Xbox version as well, since TU8.