These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crowning Music of Awesome - The soundtrack as a whole is top-notch: special mention goes to the final boss theme, as the track matches the all-or-nothing concept of the battle perfectly.
Game Breaker - There are several: The Shadow Servant Magic allows you to attack 2 times in one turn. The Silver Hand allows any character to attack twice in one turn provided it is not a 2 handed weapon. There is also the Revive Fire Magic, which instantly resurrects a fallen character, and the Water Ball Water Magic which provides a shield from the final attack that would KO you and damage your Life Points. The Last is the Overdrive Water Magic, which always allows you to get the first hit on the enemy.