in the case of the card introduced in 500 Years In The Future , its a Trafalgar Law card thats being released as a Treasure Rare
For instance, a goblin from the Dominarian plane is green-skinned with pointy ears and a big nose, while a goblin from Kamigawan plane would have red skin, with a wide mouth and a bumpy shell on the back
While there are other weird things you can do with activated abilities on creatures, the bread and butter of the deck will be cards like Will, Scion of Peace for cost reduction, Beacon of Immortality for big mills, and Sphinx of the Revelation to draw a lot of cards
Shield counters don't prevent players from sacrificing creatures
it only has five
It is possible to build a Dredge deck without Dread Return, or at least win without getting one into your graveyard