Skill Points

Skill Points (commonly abbreviated as SP) are a statistic found in Castlevania: Portrait of Ruin. Most enemies in the game will grant a determined number of SP when defeated, which will then accumulate on a certain sub-weapon's count toward mastering it. The total amount of SP necessary to "MASTER" a sub-weapon can be consulted on the PAUSE menu, GUIDES > SKILLS. If the player is able to satisfy the required amount of SP for a sub-weapon, he will be granted with a more powerful version of that sub-weapon.

Wearing the Master Ring will increase the amount of SP gained after each kill. The effects of the Master Ring stack, so one can wear two Master Rings in order to master a sub-weapon faster.

Most bosses will provide a large amount of SP; one must only hit them once with the preferred sub-weapon and then concentrate in attacking them as normal. However, some bosses (most notably, characters in the storyline) won't provide any kind of SP or experience (Stella, Loretta, Whip's Memory, Brauner, Death and Dracula).

Two of Wind's quests require mastering some sub-weapons in order to be completed:
 * The Spear of Legend - Become a master of the "Javelin". I will then bequeath you my spear.
 * Master the Holy Power - Master these three moves of holy power: "Cross", "Holy Water" and "Bible".