What are the most powerful cards in the pool, i.e
According to TCGplayer, there are (as of Nov

Small Crease (under 1/4th of the length of the card) Visible on the Back -3 points Visible on the Front -4 points Medium Crease (under 1/2 of the card length) Visible on the Back -5 or 6 points Visible on the Front -6 or 7 points Large Crease (under 3/4ths of the card length) Visible on the Back -7 points Visible on the Front -8 points Full Crease all the way through the back of the card -8 points (-9 points if visible on the front) Small Bent Corner Visible on Back -3 or -4 points Folded / Lifted Corners Visible on Front -5 points (more if big) Indents: Super small indent -1 point (-1 for additional indents) Medium indent -3 points Large indent -5 points or more Surface: Super small single scratch may be no deduction 1/4 inch scratch or more -1 point Too many scratches on holo to count -3 points Front has scratches exposing holo silver layer or white layer -1 point Front has PokeMold or other dust/finger prints -1 point Back has minor whitening (3 to 5 dots) -1 point Back has moderate whitening (6 to 10 dots) -2 points Back has major whitening (11 dots or lots of wear) -3 or more points Corners: Corner coming up (dented) -3 points Corner not rounded correctly -1 point Obvious corner miscut -1 point Whitening over the size of a pin dot -1 point Edges: Whitening on the edge -1 point Whitening on two sides of the card -2 points Whitening on all sides of the card -3 or more points White fuzz coming off the card on edges can suffer from -1 point A ding on an edge can suffer from a -3 point or more deduction depending on size of the damage

When you cast your next creature spell of that type this turn, that creature enters the battlefield with an additional +!/+1 counter on it
Legendary Planeswalker Karn Mythic Dai-XT null/null NOT LEGAL Standard NOT LEGAL Future NOT LEGAL Historic NOT LEGAL Timeless NOT LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Explorer LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl NOT LEGAL Brawl NOT LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern LEGAL Predh +4: Target player exiles a card from their hand
Judge promos: Limited-edition cards given to certified Judges, often featuring unique art or foiling, can reach four figures