Now pinkie you know that's not right. You first have to drop water onto lava to make obsidian, don't do it the other way because that will make cobblestone. then you use the diamonds you've mined to make a diamond pickaxe, the only tool you can mine obsidian with. Then once you have 10 to 14 blocks of obsidian you place them 4 across 5 up to make a portal. Then it's a simple matter of using a flint and steel to light and obsidian block on fire but it must be done within the portal. This will then activate the portal ready for your travels to the nether world. Where you can help yourself to the ghasts, blazes or zombie pig men. Wither and Ender dragon sold separetly. Remember If it ain't minecraft it ain't worth creeper. Or you could just fnd scorpion