Terranigma

• Magirock is reusable; when you use a magic ring or medal, the magirock you invested in it is returned. It's more of a pool limiting how much magic you can carry around at once than a currency.

• Magic is of debatable use altogether. Many of the later boss fights outright prevent using magic at all. You may find you get the most consistent use out of Grass Pins and Wind Pins.

• The boss of Sylvain Castle is infamously tuned too high. You either have to grind your way up to level 25, or you can load up on Elec Rings and Grass Pins and keep your fingers crossed. This is one point where magic actually comes in handy. It's also weak to holy damage, so switching back to the Holy Spear instead of your current best spear might get you more damage, depending on your level.