Despite having MP, the only spell he casts does not seem to use the MP. The moment he is aggravated by a player, he will become completely invisable as long as he is either stationary, or attacking. If the player runs around a bit however the boss will briefly reappear to chase them before becoming invisable again.
Using Melee attacks, the Fox Ninja Master does 510 damage, and he has a defense of 330. Fox Ninja Masters drop the following items.
Worn Predator Claws at a 1.1% drop rate.
Peasant Gloves at a 2.1% drop rate.
Peasant Boots at a 2.1% drop rate.
Peasant Chest at a 2.1% drop rate.
Peasant Cap at a 2.1% drop rate.