Add 2 "Archfiend" cards from your Deck to your hand, except "Highness Archfiend", also for the rest of the turn, you cannot Special Summon monsters from the Extra Deck, except "Archfiend" monsters
To add more synergy and damage, you can replace Darkrai EX with Nihilego (another free retreat cost case thanks to Bombirdier), but remember that the new Field Blower Item card is bound to gain widespread usage due to its capability of removing Tools like Poison Barb or even a Stadium
The English release puts it in front of a much larger Western audience buying in their own language, though dont mistake that for untapped demand
Truth be told, you will most likely be using these two to clone other people's stuff, as your own pickings are kinda terrible in comparison to that Pathrazor of Ulamog the Golgari guy just dropped on turn 4 or the Akroma the angel deck just cheated out on turn 3
This card works passively too: If you mill five cards and three are lands, youll put them all onto the battlefield
Keep the damaged original and call a judge