Interestingly enough, Dark World Lightning's funny awkward text (seriously took me a long time to decipher the precise technical ordering for that card's effect) isn't a "cost" because its wording makes it an effect... It's a good random tech card (but only use one of them) to use sometimes as it destroys anything face down. With that in mind, Goldd can combo a bit with that. The other card is probably going to be Morphing Jar in combination with the Dark World lords, which Exchange of the Spirit users will love to see Sillva backfire with (Discard my hand? Cool! *exchange*)
Goldd is better than Sillva, because it basically forces an open field even better than Mobius. Mobius still risks against a possible facedown D. D. Assailant, but then Goldd can blast that apart as well. Delinquent Duo-effect of Sillva is powerful as well, but just not as good as Goldd. Both of them destroys resources for advantages, but Goldd can generate the open field unlike that of Sillva (and not to mention, Sillva may bring out your enemies' Sillva/Goldd)
Mobius's firm stand as the "Tribute of the Ages" isn't so firm anymore. With so many "OMG TRIPLE SPIRIT REAPER AND TRIPLE DON ZALOOG WITH MIRROR WALL U R DEAD KHEHEHE" type of stuff out there, it may not be all too hard to use Goldd's special effect. You must be sick if Goldd isn't in your sidedeck the second you got one.