Well, it took me months i rather spent in Sentinel Souls only to get the Pharaoh Eddie. Countless 3*s, a few pyros and SSD, 3 alliance generals later i got him. (not to mention countless Skillshards i missed) Then only to get him as 4* for free? Can't say that i'm beyond the point of needing him now, I even dropped me another Pharaoh, even though it said, he was removed from the book of souls.
So yeah, i expected something similar to the Pharaoh-Eddie Event, where you could get a Cyborg eddie for real.
He may be rare, but he is by now by far not the most powerful eddie. I have him on one device and only use him in PVE. For PVP, i have far better eddies.