Here a idea the mission that drops a artifact that resets the clock for the 3 races that improve resources on a planet. 100 completion to complete the mission. 25 energy for each completion. each one completion drops artifact that resets the clock. to provent the artifact from being used on accident 200 energy must have been stored up plus the cost to use it. I thinking 10 energy to use the artifact that mean you need 210 stored up and clock greater than 0 to use.

100 ranks... makes it limited but also useless

no matter how you will put this ill probably give it a -1

i made some changes

Now its even worse , like this i could uplift ALL my planet slots to 15x arti in a couple of days

well not all since there was a 60 artifact limit but that would allow one person to move 4 planets from just mega rich to 15x ridiculously easily. I would say more a repeatable mission close to the guidelines but the art only cuts down the timer by half of the current timer so at most it takes 20 hours off. This is still a bit OP but a lot more manageable as energy is rarely the factor holding back the people using this ability regularly past the medals.

i changed it back to 100. repeatable or not?

Repeatable or not, it's a crap idea and bloody overpowered.

People can just buy energy refills rather than buy terraformers i have over 5000 energy max as a taltherian, everytime i rank, i can just increase my planet richness twice. since I rank up about twice a day so i can accumulate up to 4 of these "artifacts" a day.

Now if got myself 100 GP and bought 10 Energy Refills, i would be able to obtain 40 of these artifacts in a single day including energy refill from ranking up per refill.. i'll be producing 15x artifact planets like rabbits... Nowadays, energy is hardly the thing that prevents players from completing missions, the amount clicking is more of an obstacle.

Ultimately -1 , just wait the damn 40 hours.