Amulet of Warmfyre

The Amulet of Warmfyre is an amulet that cures Icewalker bites.

History
After Marge's mother got bitten by an Icewalker, Marge made Homer get the money to buy the amulet, which cost 100 gold pieces, to save her. Lisa turned lead into gold using magic in order to get the amulet, which led to her being taken by the king's wizards.

When Marge's mother was presented with the amulet, she refused to wear it at first, choosing death, until Marge convinced her to wear it. During the battle at the castle, she took the amulet off, changing to her icy form, then walked into the dragon's mouth and killed it.