Domination league

"A variety of powerful Shrines now spawn throughout Wraeclast, surrounded by large groups of monsters that are influenced by their power. These monsters receive substantial bonuses or are protected by their shrine's effects in some way. If you are able to tag the shrine, you receive these powers for a short time. It's often very risky to run in and try to claim the shrine, but it is a gamble that can pay off."

- Description on the official Path of Exile website

The Domination league was a four month softcore challenge league. This league introduced shrines.

It started, along with the Nemesis league, on October 23, 2013 and lasted until February 23, 2014. At the end of the league all characters and stashes were moved to Standard league. Characters that died during the four months respawned in Domination.

Modifier
All areas had

Items
Domination had seven exclusive base item types (all shared with Nemesis) and seven exclusive uniques (six of which were shared with Nemesis). The base type could not drop, but by using a new vendor recipe. The gem could not be obtained, and IIQ mods could not spawn on magic and rare items.

Exclusive base item types
The following item types were introduced exclusive to Domination and Nemesis. Following the end of the leagues, these base types became available in standard and hardcore leagues.

Four flask types:

And three ring types:

Exclusive unique
The following unique were shared between Domination and Nemesis. Four unique rings and one unique flask. Since version 3.14.0 they are part of core drop pool, with always a vendor recipe only item:

The following unique is shared between Domination and Nemesis.:

This unique was specific to Domination only: