They are called black core due to the paper used to make them which has a black inner layer, instead of a blue one
Size This seems like the easiest thing for the producers of fake cards to get right, but its not uncommon for fake cards to be slightly smaller than their authentic counterparts
In a colorless deck, it's a straight " pay three, tap, draw a card " effect
Earthshaker Giant I rate this is a bit better than End-Raze Forerunners but not much, one spot better, since it's cheaper for a smaller 6/6 with trample too, but gives your team trample and an additional +1 size
These little guys can block some of the most aggressive creatures in Modern like Ragavan, Nimble Pilferer or Goblin Guide pretty well
It's not a Human, but it gets buffed alongside the Humans she makes