A case of Ravnica Remastered Draft booster boxes is as big as you can go in one purchase of sealed product
If a card is good outside of Standard (such as EDH), do not expect it's price to drop until it receives a reprint, a banning (from a format it sees play in), or it is replace/realized to be not as good as it is
Here is a guide that shows what the grades mean: Guide
It's probably 80% creature removal, 10% graveyard hate, 10% enchantment removal, but turning a 2-mana removal spell into a targeted hatepiece when it matters is huge upside
All of that comes at a price of 12 mana
It also doesnt count as a Goblin, but since it isn't a creature its a little more resistant to removal effects, which most often hit creatures