extensive character customization is one of the primary design goals for Diablo III. Players will have many ways to customize and build each of the five character classes, including charms, traits, enhancements, gems, armor, weapons, dyes, skills, and the feature we’re highlighting in this article: runestones.
There are more than twenty skills per class, and a player can choose to access up to seven of those skills at any one time. Skills primarily allow characters to perform special attacks and cast spells, but they can also activate defensive abilities, summon minions, set traps, or allow the player to navigate the battlefield through quick travel and escape mechanics. While these skills always present players with plenty of tactical options for defending Sanctuary against the coming demonic invasion, runestones allow you to customize skills by changing the way they look and how they function.

There are five runestone types: Crimson, Indigo, Obsidian, Golden, and Alabaster. Each runestone affects skills differently. For example, adding a Crimson Runestone to a skill may enhance its damage, while adding an Alabaster Runestone might add a stun effect.