Niv-Mizzet, Dracogenius : Two generic, two blue, and two red mana, 5/5 Legendary Dragon Wizard, flying
These are just 1/1s and cannot block, but once you control five Rats total, all Rats get +2/+0 that turn, so this can kill faster with 3/1s not 2/2s after a while
Although I havent opened that many packs in my life, the only error card I ever unpacked myself is this Delibird, which has yellow smudge over the entire card including the image
Despite the clear danger, he was always trying to slip off on his own
This color combination often embodies themes of organized rebellion (Red-White) mixed with elements of sacrifice or morally grey tactics (Black), fitting the struggle against a tyrannical empire and the use of powerful, sometimes dangerous, magic
Perhaps that's because, despite the massive damage potential, they're simply too slow to make use of that massive attack