A standard, single-player playmat is usually 24 inches by 14 inches (61cm by 35.5cm)
Poor to Fair 1 - A card will achieve this sort of grade if it has quite extreme edge and corner wear, complete loss of original gloss as well as other obvious signs of wear such as scuffs, scratches, pitting and stains
You can only use each effect of "Fabled Marcosia" once per turn
Combustible Gearhulk Browbeat is a bad card in Commander: drawing 3 cards for 3 mana (in Red!) is amazing, but the problem is that any opponent can agree to take 5 damage instead, and someone sitting pretty at 30+ life will deny you the card draw
Its a staple in competitive merfolk builds
Maybe Wizards thought the "activate only once" text would confuse players, but that actually simplifies the card since it can't bounce back and forth between the two options