Valiant Knife is a mid-ranked dagger for Locke. It has an attack power of 145, gives +10% Evasion, and enables the Runic command (although Locke can't use Runic). It can be found in Kohlingen in the World of Ruin. It is a unique and powerful weapon in that it deals more damage the lower Locke's HP is, ignores the enemy's Defense stat, and ignores the penalty of the Master's Scroll relic.Only one exists, and it cannot be thrown.
It deals normal damage as per its attack stat (see here), plus (Max HP - Current HP).
The Valiant Knife is a level 69 dagger with decidedly mediocre damage of 24 and delay 195, but with a hidden effect of dealing increasing bonus damage as the user's HP drops. At less than 1% of maximum HP, it is the best dagger in its level range, but surviving in such a state is likely to be difficult at best. It drops off the Notorious MonsterLindwurm in Ifrit's Cauldron.