The strongest includes here are no doubt Deflecting Swat, which can be cast for free when its in your hand, and Teferis Protection, which can stop you losing for a turn cycle
Not rock-solid evidence, cards can be missing in the sequence or get flipped around, but from the same box he also got packs containing the preceding (Nightly Garbage Run - Dark Jolteon - Dark Primeape) and following (Dark Charmeleon - The Bosss Way - Dark Machoke) 3 cards on the sheet, so it looks like whatever was in the Dark Dragonites position is missing from the sequence entirely
It takes a taxidermist of unusual skill to cleanly stuff and mount a beast without severing its primal, predatory drive
This is a bit like Lightning Helix when used in most agro decks however unlike the Knight, Helix is a very desirable control card where the life gain goes from irrelevant to highly significant
Professional grading companies like PSA (Professional Sports Authenticator), BGS (Beckett Grading Services), and CGC (Certified Guaranty Company) evaluate cards on a 10-point scale