Get over 30 lives, and then your lives will become unlimited.
Get four million points in Novice mode or seven million points in Standard mode to unlock the Ex Magic Pendant, which increases magic to Level 3 and decreases it by half.
Get two million points in Novice mode or five million points in Standard mode to unlock the Knight's Soul.
Successfully complete the game without getting all the rings to unlock the Steed's Soul. This item increases movement speed by 20%.