How do you make obsidian on minecraft pe?

Answer 1

Obsidian always needs lava, either you make it with lava or water or find where the two have met naturally while underground. It cannot be crafted.

Answer 2

You can make obsidian by pouring water onto lakes. Then, you can mine it but you need a diamond pickaxe.

Answer 3

When your nether core reactors time runs out, you will get obsidian and you will keep your core.

Answer 4

I do not think that lava even exists on minecraft PE. You need to have water pour onto lava.