If you dont see a black line, the card is probably fake
Yes, many Japanese Pokemon cards are highly valuable
I'll leave that up to you, just remember fingerprints contain oil and can damage some materials
And not only is it tough, but it can chew up the graveyard, to combat opposing Tarmogoyfs, Snapcaster Mages, Grim Lavamancers, dredge cards (like Life from the Loam), and presents a serious clock to the opponent
The reward may not be immediate, but it is cumulative, and saves your board in a pinch without any complications
SR Super Rare Metal Dragon X WIND Level 6 [ MachineFusion ] ATK 1850 DEF 1700 "Steel Ogre Grotto #1" + "Lesser Dragon" R Rare Spike Seadra X WATER Level 5 [ Sea SerpentNormal ] ATK 1600 DEF 1300 Using the spikes sprouting from its body, this creature stabs its opponents and floods them with electricity