No fake cards or from China replica cards
Just this weekend, I witnessed a Craterhoof Behemoth give +41/+41 in a Commander game (the player still lost on account of Teferi's Protection, but would have been able to run the table otherwise)
2 | Callous Inspector Much like Forecasting Fortune Teller, Callous Inspector is on this list due to being a cheap creature that comes with an artifact attached
Its sheer versatility is astounding, and it's borderline unfair to tuck a permanent for 2-mana right before the opponent shuffles his/her library
I give it specific guidance, like Rate the power level of the card on a scale from 0-6, where 0 is unplayable, 1 is very weak, like a bad common, 5 is very strong, like a bomb rare, and 6 is super overpowered like a black lotus