Electron bomb for 200prestige?
You crazy? 50 Krogmo coins for the 3*, 100 Krogmo coins for the 4* (electron bomb) = 150 Krogmo Coins = 2 Mod Calibrator x 13k crowns at the least
Now 600 energy and 3.5k crowns for creation........ 29.5k Crowns + 600 energy for 200 prestige? Either your game is making these prestige missions at random with crap rewards for items that are hard to make, or you guys are greedy and want people to buy and waste their CE.
Use the search bar.
Or at least look over the titles of threads on the first page for anything similar.