You can use this to retrieve any "Forbidden One" monster - especially after they have been sent to the Graveyard due to "Armageddon Knight's" effect - and can be further used with "Armageddon Knight" himself.
Also, with the strategy mentioned above, you can use this card with "Prometheus, King of the Shadows". You don't need to worry if "Prometheus" is dumped early to the Graveyard, as you can recover it when you need it thanks to "Dark Eruption", making possible even an OTK in late game.
This card is useful in a deck that uses Blackwings because, unlike "Against the Wind", it can return monsters to your hand cost-free. Monsters that this card can target include: