black bolt pokemon cards N's Plot 165/086 a premium Japanese Scarlet Black Bolt - Pokemon TCG

Yes, but you have to reveal both copies of the Infernal Spawn of Infernal Spawn of Evil to show that you actually have two copies in your library

III Choose up to three target creature cards with total mana value 8 or less in your graveyard

It fetched a cool $3,000,000

It is the adding of cards to the graveyard combined with the ability to find non-basic lands and as such in no way alter or impede your mana base

This isnt always easy to define, but when I think of a graveyard strategy, Im generally referring to an archetype whose primary route to victory is severely weakened or fundamentally altered without access to the graveyard as a resource