As stated in the news story, this was used on Japanese Pokemon cards before Wizards was ever involved
If a card still looks early after a spike, the next best checks are its tournament usage, public deck usage, and set-level support
But even then, Ain is correct in that milling multiple monsters from the Deck is a risky effect, because it can set up for so many things
Visible print lines on the front will prevent a PSA 10
Sure, your opponent gets to replace it with a basic land, that doesnt really matter since Boseiju, Who Endures is borderline unstoppable
If you have three Dragons in play, youre very likely already winning the game, and turning Nogi into a 5/5 creature with flying is overkill