The forces of reality are a fickle thing... so far away and unalterable. perhaps we should change that.
Through the powers of copper iron and redstone, an inert shell powerful enough to contain reality... cannot in fact be created like that, however it will with a little push.
With enough energy, be it 1 billion FE, powerful creative essence, or the clashing forces of Echo shards and many... many... countless nether stars, can a hole in reality be torn within the redstone of the shell, forming... A COMMAND BLOCK. truly you have become akin to a god... but maybe not yet.
Although you have this very expensive block that makes your hands tingly and fills you with a strength unlike any other, you're still a long way from fundamentally altering the world around you, let alone reality. so first, you should make some tools to work as conduits for the commanding power.
First thing you should do... is right click the block with a nether star, then put that thing in a brewing stand. supply the stand with mundane potions to create Creative Essence, which can be smelted into creative ingots, which can be formed into the tools needed to harness the creative energy.
There are many tools that will make you overpowered, but that's a long shot from actually doing commands. perhaps one day that will change. perhaps.
jei is recommended, more information will be available on the wiki.
rip technoblade.
Same mod on curseforge: https://legacy.curseforge.com/minecraft/mc-mods/scbm-survival-command-block-mod
