one piece card game op2 SP OP02-013 SR Kureha and Dr One Piece Trading Card Game

Whisperwood Elemental This green creature certainly has the potential to make a lot of face-down creatures, but for 5 mana, I think the sacrifice activated ability is a little too situational

The other two look pretty much identical except that one is foil

The 7 mana worries me less since black has things like Dark Ritual, Cabal Coffers, and Crypt Ghast in it's arsenal

In Legacy, there are even more three drop options like Uro, Titan of Natures Wrath that are capable of taking over a game on their own

All of the cards pictured above are great ways to fill the graveyard

[-3]: Target opponent loses life equal to the number of artifacts you control