The Energon Pub

Takara always seems to deliver unique repaints that homage niche characters from their market, and black Optimus Primes. Gregevor is one of those homages going back to the early 2000's RID character Rollbar. Nemesis Prime I guess could be said is a tribute to Scourge/Black Convoy from the same line; even though there have been many takes on the black Prime over the years. Both are worth a look if you're interested in well done repaints.