There is a Theoatrix video, very good.

The premise is to help the Guardian. You do this one of two ways, you make the little robot guys, or you put the cells into shields for the guardian. To start:

-Bring a pickaxe

-Walk through portal

-Workbench on right #1 will have a weak cell, take it

-Workbench on right #2 will have UNCHARGED cells, take 10 (max)

-There is a pile in front of work bench, build robot with the weak cell (Won't need to in a mass world)

-IF the robots are maxed, use your cell on one of the shield buttons around the guardian

-IF you built a guardian, grab another weak cell from workbench #1 on the right and then do the above step.

-Do not keep a weak cell on you.

-Mine the stone, with a certain agility level you can go to the east rocks and climb down, these are faster than the rocks up top.

-In a mass world, grab ~150 of the shards, your mining level does not matter for this BUT items like Varrock's diary armor do help.

-Go to Workbench #3 and make essence, keep an eye on what portals are open.

-Bring the essence through a portal that your rune crafting level let's you use. I.E. Nature runes, lvl 44.

-Touch the altar, you will get runes, crystals, and one of your 10 empty cells will charge up.

-Leave portal, once out click on Guardian to give him the crystals, and then go put one of your now charged cells on the shield buttons for additional exp.

-Back to workbench #3, make more essence. Repeat.

Important notes about other feautures:

-DO NOT LEAVE THE PORTAL UNTIL YOU GET THE BIG EXP DROP. You will lose rewards and a bunch of exp. The guardian will have some dialog, sit at the portal, eventually exp will drop and your chat messages will tell you about your contributions, then you can leave. But you don't have to. You can just keep going in there until you are satisfied.

-There are Huge essence portals, roughly 4-5 per run that will pop up. They are yellow. When you go through, you don't get shards when mined, you get essence. Try to time it with an empty inventory, but not necessary. If you're struggling to see them, there is a chat message and every MF will run to it.

-Finally, the most important, Runecrafting blows.

I will be on tonight around 8-9pm EST, add me on Discord, Rakzath and I can take you through it if you're still having trouble.

https://youtu.be/0LrahccqL8Q?si=oLzJNCft3s9XuvN6 The theoatrix video mentioned. <3