Mourneblade

The Mourneblade is a soul-feasting sister-sword to the more famous Stormbringer sword in Michael Moorcock's novels. Like its sister, it is a sentient demonic sword that can bring its weilder strength and vitality from slain foes.

In Elric of Melniboné, Elric and cousin Yyrkoon find the runeblades in a realm of Limbo and commence battle. Elric and Stormbringer disarm Yyrkoon, and Mournblade disappears. Yyrkoon is defeated, and Elric and his cousin return to Imrryr.

In The Weird of the White Wolf, Elric returns to Imrryr after a long journey and confronts Yyrkoon, who usurped the throne in his absence. Yyrkoon has regained Mournblade through unknown means and uses it to attack. Elric and Stormbringer kill Yyrkoon, and no further mention is made of Mournblade. All of Imrryr is destroyed by invading forces, so it seems that Mournblade shares the city's fate.

In Stormbringer, Elric learns that the representatives of Fate, which serve neither Chaos or Law, recovered Mournblade from the netherworld. They present it to Elric and explain that the runeblades were designed to be wielded by those with Melnibonéan royal blood as a check against the might of the Dead Gods of Chaos. Elric gives Mournblade to his kinsman, Dyvim Slorm, and the two men become embroiled in a confrontation between the gods. Elric summons others of Stormbringer’s demonic race (also in the form of swords) to fight against a number of Dukes of Hell, brought to the Young Kingdoms by Jagreen Lern, theocrat of Pan Tang.

= Mourneblade in Castlevania = The Mouneblade only makes an appearance in Symphony of the Night, where it replenishes Alucard's health whenever it strikes an enemy. No other game features a primary weapon that can replenish health from an attacked enemy.