Possible MMC not-Obsidian from the Spartan pack in comic.
>>5260136Greebling isn't always bad. It's all down to how a figure is detailed.
Most of the time people refer to greebleshit they mean shitty detail filler. Possibly the most obvious cases of this is with Cassy Sark's MMC designs, Warbotron, and Gcreations. These figures have a lot of parallel line "vents" all over the toy that serve no purpose other than superfluous detailing to fill space. Much of the time it is so prevalent that it is downright messy, amateurish, and the figure would actually look better without any of the extra detailing at all.
Other times with Transformers, the highly detailed 3p figures does not mesh well with the more simplistic details of the official stuff or even the official designs they are supposed to be drawing from.
On the other hand the greeble isn't always bad. Perfect Effect, Generation Toy, and Mastermade have a high amount of detailing on their products. It's not shitty filler lines, but actual intricate detailing.
