Thanks for this thread, ralouf. It made me continue with Elements to hopefully finally beating those false gods and receiving a few upgraded cards - up until that point I recommend Liquid Antimatter, it also works fairly well, great considering it has no upgraded cards. It only took about 3000 games to finally get 2 lobotomizers (today I had a rare spin in the arena with two lobos already there, but once again, no luck). I had spent 6000 of my precious electrums in the meantime on 4 RoL and with these I finally started FG farming, obviously a 30 card deck because I only had the 4 RoL. But it worked pretty well nonetheless, managed to add a fifth RoL soon after and so far it's been successful enough that I hardly lose electrums over time... keep those upgraded cards coming, gods!