The Vile Blade is a weapon added in the Vault of Tears update.It appears in Infinity Blade II.The Vile Blade is Ausar's former weapon until he found the Infinity Blade. It is obtained after defeating the Bog Giant and Moss Golem in the marsh at the base of Saranthia. It is part of the Vile set and it has one Light gem slot and one Triangle gem slot.
When combined with the entire Vile Set, go to the shrine and tap on the neck to open the tomb of Ausar to obtain The Holy Band. When all are equipped, the player will wield the bonus Drop Rare Items +30% which can be useful for finding locked items or large keys.