Unlocked 12 challenge missions.

Completed Episode 9.

Used "Just Guard" 100 times.

Used "Dodge Burst" 100 times.

Sliced an enemy upward and finished it in the air.

Cleared 6 challenge missions.

Completed Episode 6.

Killed an enemy with an enemy attack.

Killed an enemy using the "Burst Rush."

Completed Episode 2.

Reached level 10.

This is proof that you've battled a wide swath of enemies. By the way, the more of the same enemy you defeat, the more likely that enemy becomes to drop equipment with skills attached. Time for some population control!