Its an uncommon artifact.

In case you were wondering, "Project" missions are meant to be completed over a long period of time. They produce a VERY powerful result and as such, you should not expect to finish one right away.

In some cases, you might need to trade with your legion to get some artifacts that you need - but of course, they will need some as well. I'm sure if you have something compelling to offer they will oblige

what is a Hyper terraforming device?

it's so uber, it's worth spending terraforming devices on that mission

a word of warning, though, you might want to flux the planet if you ever get one, to make sure no one else can see the planet, once hyperterraformed

what happens when i use it on a planet. what change will it give to a common massive gas planet for example?

you'll have to do the mission to find out, I don't want to give away any spoilers

Btw well done on fluxing your VL Barren planet Kuren, it was tempting to see these lvl4 ore mines :p
but at the same time ... I don't think I would have done any harm for obvious reasons :p

Oh and ... If anyone has terraforming devices for trade, I'm interested :p

oh, was that you that could see that planet?

yeah, every time I get a planet probe artifact, i rotate through my better planets, and I keep a spreadsheet on google.com/docs of which planets are at risk, and when I get a planet eraser, flux probe(?), I erase the planet, I got to clear 3 planets last week.

I can't tell who can see the planet, but I don't want to lose some of my precious's

yeah, I started research on the +5 planet miners, but ouch, would take me days to research it all, and i shudder to think how many millions it would cost to build just one +5