2004 yugioh world championship deck GBA These have a gold border and a different back than a normal magic card Yu-Gi-Oh! World Championship Tournament 2004

I also see something about packs, where the cards contain 6 cards

Special Summon it, then you can attach your "Number" Xyz Monsters that are banished and/or in your GY to it as material, that have a number between "101" and "107" in their name, up to the number of monsters Tributed to activate this effect +1

The Spike Looking at EDHREC data, over 1200 new decks have been created in the past month using Maha, Its Feathers Night

Sort Card Type Skeledirge #38Rare $0.85 Skeledirge #38Rare $0.20 Skeledirge #31Rare $0.14 Skeledirge #19Rare $0.22 Skeledirge - 031/191 (Cosmos Holo) #31Promo $5.87 Skeledirge - Armarouge 36 #38Rare $0.16 Skeledirge ex #137Double Rare $0.77 Skeledirge ex - 020/073 #20Double Rare $0.29 Skeledirge ex - 032/190 #32Double Rare $0.25 Skeledirge ex - 034 #34Promo $0.85 Skeledirge ex - 037/193 #37Double Rare $1.14 Skeledirge ex - 037/193 #37Double Rare $0.78 Skeledirge ex - 081 #81Promo $1.81 Skeledirge ex - 081 #81Promo $2.68 Skeledirge ex - 087/073 #87Super Rare $1.48 Skeledirge ex - 097/073 #97Special Art Rare $49.03 Skeledirge ex - 102/073 #102Ultra Rare $7.23 Skeledirge ex - 137 #137Double Rare $0.97 Skeledirge ex - 233/193 #233Ultra Rare $2.59 Skeledirge ex - 258/193 #258Special Illustration Rare $37.90 Skeledirge ex - 272/193 #272Hyper Rare $6.15 Skeledirge ex - 324/190 #324Shiny Secret Rare $1.02 Skeledirge ex - 097/073 #97Special Art Rare $49.03 Skeledirge ex - 258/193 #258Special Illustration Rare $37.90 Skeledirge ex - 102/073 #102Ultra Rare $7.23 Skeledirge ex - 272/193 #272Hyper Rare $6.15 Skeledirge - 031/191 (Cosmos Holo) #31Promo $5.87 Skeledirge ex - 081 #81Promo $2.68 Skeledirge ex - 233/193 #233Ultra Rare $2.59 Skeledirge ex - 081 #81Promo $1.81 Skeledirge ex - 087/073 #87Super Rare $1.48