Lastly, a great resource has been the Magic: the Gathering Counterfeit Detection group on facebook
Tunnel Surveyor is just a great value card with good theme synergies, exactly what Im looking for in a number one common for a color

Beginner: Red Dragon Archfiend Deck Who This Is For: Beginners Deck Strength: Strong Rule Complexity: Average Ease of Building: Easy to Collect and Build 2 Red Sprinter 1 Red Familiar 3 Wandering King Wildwind 3 Witch of the Black Forest 1 Creation Resonator 3 Crimson Resonator 3 Red Resonator 3 Synkron Resonator 1 Chain Resonator 3 Ascator, Dawnwalker 1 Fire Ant Ascator 3 Effect Veiler 1 Monster Reborn 3 Resonator Call 3 Resonator Command 1 Burning Soul 3 Red Reign 2 Red Carpet 1 Red Supernova Dragon 1 Hot Red Dragon Archfiend King Calamity 1 Tyrant Red Dragon Archfiend 1 Red Nova Dragon 1 Hot Red Dragon Archfiend Bane 2 Hot Red Dragon Archfiend Abyss 2 Scarlight Red Dragon Archfiend 1 Hot Red Dragon Archfiend 1 Red Dragon Archfiend 1 Chaos Ruler, the Chaotic Magical Dragon 3 Red Rising Dragon Instructor Created Deck #337: Laval Deck Featuring Book of Lunar Eclipse Continuously attack with Laval Dual Slasher A Laval Deck that uses Book of Lunar Eclipse

The poker card size is also 2.5 3.5 inches
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While it might not be a format-defining card in Constructed, I wouldn't be surprised to see this show up in Standard decks