Dark World's gate to higher Tier - Gate of the Dark World

Gate of the Dark World

Field Spell

All face-up Fiend-Type monsters gain 300 ATK. (Once per turn?) You can remove from play 1 Fiend-Type monster from your field or Graveyard, discard 1 Fiend-Type monster and draw 1 card.

Another good Field Spell? Yay! If its not once per turn, it's busted. Even with the clause, this card is awesome. Not only gives you a discard each turn, but also gives Dark Worlds the needed draw speed. Also works on Fableds :D I hope that remaining 3 cards from SD21 will be as good as this and Grapha. We're rooting for you, Konami.

Oh, interesting Dark World build to be posted later today. Hint - what card discards as an effect and fills your Grave with Fiends?