As always, it depends on your criteria
These little guys are extremely tough, waterproof (IPX7 Rating), crushproof, protect against static electricity, and even float in water
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
(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
All except the Secret Packs are pretty self-explanatory: They contain boosters with the cards indicated in their description