This is what I believe they intended for set support. There might be more, but that's still debatable..
E-HERO Captain Gold [Ultra Rare/Ultimate Rare]
Light/Warrior - Effect/4/2100/800
By discarding this card from your hand to the Graveyard, add 1 "Skyscraper" card from your Deck to your hand. If there is no "Skyscraper" on the field, this face-up card on the field is destroyed.
Warrior of Atlantis [Rare]
Water/Aqua - Effect/4/1900/1200
By discarding this card from your hand to the Graveyard, add 1 "A Legendary Ocean" card from your Deck to your hand.
Envoy of Sky Zeradias [Rare]
Light/Angel - Effect/4/2100/800
By discarding this card from your hand to the Graveyard, add 1 "The Sanctuary in the Sky" card from your Deck to your hand. If there is no "The Sanctuary in the Sky" on the field, this face-up card on the field is destroyed.
General Demon [Rare] (General Archfiend)
Dark/Demon - Effect/4/2100/800
By discarding this card from your hand to the Graveyard, add 1 "Pandemonium" card from your Deck to your hand. If there is no "Pandemonium" on the field, this face-up card on the field is destroyed.
