To make mythics, start with an item with 4 sockets in it. You can get these as a drop, or you can create one with the crystal Zircon. Place the four listed mythstones into the sockets and it will magically turn the four mythstones into the mythic.I don’t think order matters, but I always do it in order anyway.
In case the link doesn’t work, here are the mythstones for Nova and Enigma. These need to be entered into an offhand to make those mythics.
Oh, come on guy…
Even I’m somewhat new around here, and I know the most basic of basics: Use Google. But, that’s a life tip… use Google for everything. I guarantee you that you’ll find the answer there almost 100% of the time.
Not trying to be rude, but dang…
you have to place the mythstones in order as it is in the wiki/codex and MAKE SURE THAT THE MYTHIC CAN BE MADE IN THAT GEAR. For example, mythics like bombard,cosmicorb and rockblast can be crafted into MAINHAND WEAPONS ONLY and cannot be crafted into any other piece of gear. While mythics like nova and vanish can be crafted into OFFHAND WEAPONS ONLY.