Each card gets its individual pocket in the binder which shields it from potential wear and tear
There are only a dozen different basic lands in Magic, the five obvious ones, Wastes and their snow-covered siblings
This effect isnt once per turn, so as long as you have Magnet Warrior monsters in the Graveyard, you can destroy as many cards as you want
Again, there is internal logic to cut off the recognition after certain size has been reached to prevent unnecessary calculations
Gary Mack (English) Grady is a street duelist, who was possessed by one of Roman's spiders and became a Shadow Drone
Special Summon this card in Defense Position as a Normal Monster (Warrior/DARK/Level 3/ATK 0/DEF 300) (this card is NOT treated as a Trap), then you can change 1 Attack Position monster your opponent controls to Defense Position