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)
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Regarded as an Extra Link, many characters have used this technique in their duels before
Aside from making an artifact in general, in the right deck this is a psuedo ramp piece as well as a utility card, so I think the versatility makes up for the two not-as-powerful combined abilities
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