The inferno blade is a slightly upgraded version of the fire blade. It has an added 16 attack and a different name and slightly altered description, but shares the same model as its predecessor. But it's worth the ingredients all the same.
Desc: A fiery blade that spits forth flames if used as an item in battle. Attack: 99 Rarity: 2 stars Recipe: Fire blade x 1, Sunstone x 1, Rockbomb shard x 3 Buy: N/A Sell: 22000 gold