Unlock Fury Mode:
During gameplay pause the game and hold LT + RT + LB + RB and press X(2), B(2). If you have entered the code correctly your magic will cool down faster.

Unlock Full Health:
During gameplay pause the game and hold LT + RT + LB + RB and then press X(4), B(2). If you have entered the code correctly your health will be fully restored. This code can be repeated as many times as you want.

Collect ALL of the hidden eggs.