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Regarded as an Extra Link, many characters have used this technique in their duels before
In particular, Lightning pulled it off using the Link Spell Card "Judgment Arrows", while Spectre performed an Extra Link consisting of seven monsters, which he dubbed "Ultimate Extra Link" ("Extra Link Full Mode" in the Japanese version)
Each Speed Duel GX: Shadow Duelists box contains 228 cards in total, all usable in Speed Duel: 200 Common cards, 20 Skill cards, 8 Secret Rare cards (out of 24) 3 of the 8 Rare Secrets in each box will be the 3 Sacred Beasts: Uria, Lord of Blinding Flames, Hamon, Lord of Crashing Thunder, and Raviel, Emperor of Phantasms
After all, you get to choose which creature you kill with Terror, while your opponent chooses with Edict