Spell charges are replenished by resting at an inn, or by using a Cottage. Each tier of spell has a number of charges, and casting a spell of that tier consumes one charge. Spells are organized into tiers, and a character can learn up to three spells in each tier learning a new spell requires them to forget one they already know. The original NES version did not use the MP system that would become standard for later games in the series, but instead a variation of the spell slots system from Dungeons & Dragons.
