About half of the main deck Dragunity monsters are low-leveled Dragon-types which Dread Dragon can search out. This is important for the deck because the low-leveled Dragon-type Dragunity monsters were their Tuners. Additionally Dread Dragon can also be used to make Dragunity Synchro monsters.
You can search out Cyberdark Claw and Cyberdark Cannon which in turn search out other Cyberdark cards from your deck. Also Cyberdark Claw and Cyberdark Cannon are important because they will be used by the other Cyberdark monsters as equip cards.
Activates from your Graveyard / Adds from Deck to hand