Runes Reforged

Starting from Pre-Season 2018, Runes and Masteries are being combined into a single system, which combines elements of both. Summoners have access to a number of slots and may choose from a collection of Runes to occupy those slots. Similar to Masteries, Runes are restricted to collections that must be chosen prior to choosing individual runes.

The new system is available to summoners of all levels at no cost and can be customized in champion select, similar to Masteries. Existing Rune purchases will be compensated, although the specifics have not been announced and Riot has been reluctant to talk about it.

Overview
Summoners have may choose two Paths, one Primary and one Secondary.
 * The Primary Path has one Keystone Rune slot, one Greater Rune slot and two Lesser Rune slots.
 * The Secondary Path has two Lesser Rune slots.

There are five paths to choose from, although two are exclusively available as Primary choices:
 * Domination icon.png Domination
 * Inspiration icon.png Inspiration
 * Resolve icon.png Resolve
 * Sorcery icon.png Sorcery (Primary only)
 * Unnamed path icon.png Unnamed (Primary Only) The name "Precision" is seen in some concept art.

An additional Trait slot is depicted in the initial announcement but is not described in the text. Within a Riot: Korea stream, the slot is shown to provide a bonus based on your Path choices.

While as of yet unconfirmed, the following is likely:
 * Individual runes may only be chosen once - i.e. you cannot pick the same Minor Rune twice.
 * The same Path can be chosen twice, but the above is still true - e.g. Domination Primary + Domination Secondary.
 * Some individual minor runes might be mutually exclusive - e.g. the 3 "Bounty Hunter" runes.

Domination
Domination can be chosen as both a Primary and Secondary Path.

Inspiration
Inspiration can be chosen as both a Primary and Secondary Path.

Resolve
Resolve can be chosen as both a Primary and Secondary Path.

Sorcery
Sorcery can be chosen only as a Primary Path.

The following runes were visible in the background of a Riot: Korea stream. While the duplication of individual effects implies filler (or placeholder) text, these demonstrate the type of effect the system will offer.
 * Gain access to free Weapon Coatings at the item shop.
 * Reduced and reflect 4% damage from enemies.
 * Singe target hits deal 25% bonus damage.
 * Gain a shield upon being hitting critical health.
 * Reduced and reflect 4% damage from enemies.
 * Singe target hits deal 25% bonus damage.

Unnamed
Unnamed can be chosen only as a Primary Path.