As always, it depends on your criteria
Beyond collecting, understanding Pokemon card rules allows you to fully enjoy the game
I'm referring to the rapid appreciation of the gold-bordered cards printed in the World Championship Decks
This can shut down many archetypes Burning Abyss, Yang Zing, Shaddoll, or even Dragon Rulers
(This card is always treated as an "Igknight" card.) If this card on the field is destroyed by battle or card effect: You can Special Summon 1 "Dracoslayer" or "Igknight" monster from your Deck, except "Ignis Phoenix, the Dracoslayer", and if you do, it is treated as a Tuner
Its very possible tha,t if your configuration of this deck shifts very slightly, Dusk is a better sideboard sweeper than Fumigate at winning grindy midrange mirrors, but not right now