Anime Fanon
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The Steel Duke is a recurring accessory in Harry Potter series, Spider-Man series, My Little Pony series, and Scooby-Doo series.

Scooby-Doo! The Ending of the End[]

The Steel Duke is an accessory that provides +200% Max HP, +200 strength, +200 magic, +200 defense, +200 magic defense, +20 agility, +200 accuracy, +200 evasion, and +77 luck. When one is consumed by a monster, it gains +20 to all stats. It can be found in Mysterio's lair after defeating Janice Lincoln, Victoria Snow, Gutherman, and William Riva.

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