Any one of the “Shadow” cards “Shadowlash, Shadow Vortex, Shadowfire, Rain of Shadows” is pretty much a must for your green card. For your deck the Farakspin card isn't a bad choice, either.IMHO, Powder Keg is the best Blue ability for Darkus right now because it can be played at any time, despite its mediocre bonus (Sadly, Darkus has yet to receive a "Mana" card)As for Red, there's always good ol' Magnetic Action or Rikimaro's Surprise.You can use Nightfall if you have a Trap for your gold card.Haunted Night is nice, but can easily backfire on you against Haos or Ventus. Gate of Doom is safer.Bronze card is really a matter of taste and should be s focal point of your strategy. Good Darkus ones include Special Help, High Voltage and Hate Gate.VILANTOR is currently the only Battle Gear with a Darkus effect, so either that or pair Rock Hammer or Twin Destructor with an appropriate trap.