XIII Faultsiphon is a Commando auto-ability, learned at level 2 for Lightning, level 7 for Vanille and Hope, and level 8 for Fang. It recovers 20% of an ATB slot when attacking a foe inflicted with a status ailment.
XIII-2 Faultsiphon returns as a Commando ability, learned at level 8 for Serah and level 38 for Noel, and can be used by Behemoth (57), Flangonzola (31), Frag Leech (8), Goblin (10), Gorgonopsid (49), Lucidon (24), Red Chocobo (21), Seeping Brie (47), Twilight Odin (49), and Vouivre (22). It functions exactly as it did in the previous game.
It is crafted using Major Power, Major White, and Major Wind Orbs.