This card cannot be Special Summoned. If you Tribute Summon this card, the Tributes must be DARK. This card cannot be Tributed by a card's effect. During your opponent's Draw Phase, before their draw, look at the top card of their Deck, then put that card on the top or bottom of their Deck.
Can give you some control and information over your opponent’s resources.
Very restrictive summoning condition.
Weak defense stat.
These cards can help you ease the summoning of Diabolos, King of the Abyss. Mausoleum of the Emperor summons it at the cost of your LP. Advanced Force allows you to tribute 1 high-leveled monster to tribute summon this card, for this you can use Darkflare Dragon
Being able to control the opponent's draws is fairly powerful, especially with only 4-card hands and a much greater emphasis on battle "traps" than the TCG/OCG. That being said, Peeking Goblin and that one Crowler skill nobody uses are better at it.