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.
EditMonster Spawner. A monster spawner is an item in Minecraft that spawns hostile mobs. They can be found in dungeons, strongholds, abandoned Mine Shafts, and nether fortresses. They take the appearance of a cage, containing a fire- which does not give off actual light- inside of which, the particular mob the spawner creates spins.