Steven's Madness

Added mastery systems for Enma, Wado Ichimonji, Shusui, and Sandai Kitetsu.

Upon getting 300 hits which each sword, mastery will be obtained and any swords that don't already have air slash abilities will gain said ability. Any negative effects will also be canceled.

Upon getting 1000 hits, the blade will blacken, which quadruples the durability, increases enchantability, and increases the damage of the air slash and the normal attack.