The Hero Crest (英雄の証 Eiyū no akashi, lit. Hero Proof) is a promotional item that recurs throughout the Fire Emblem Series, permitting infantry units Level 10 and above to promote into the second tier of their respective class lines. The Hero Crest promotes Mercenaries into Heroes, Myrmidons into Swordmasters and Fighters into Warriors. In Fire Emblem: The Binding Blade, the Hero Crest is also used to promote Pirates and Brigands into Berserkers.