Nemesis league
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The Nemesis league was a four month challenge league aimed at players who are looking for more challenging gameplay. In this league, every rare monster had one powerful Nemesis modifier, making them even more deadly.
It started, along with the Domination league, on October 23, 2013 and lasted until February 23, 2014. At the end of the league surviving characters and stashes were moved to the Hardcore league. As with regular Hardcore, characters that die during the four months were moved to the Standard league immediately.
Modifier
All areas had the following modifier:
- Rare Monsters each have a Nemesis Mod
Items
Nemesis had seven exclusive base item types (all shared with Domination) and seven exclusive uniques (six of which were shared with Domination). The base type 
Prismatic RingPrismatic RingRequires Level 30+(8-10)% to all Elemental Resistances
could not drop, but by using a new vendor recipe. The Module Error: No skills found with q_where = skill.active_skill_name="Item Quantity" 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: Lua error: not enough memory.
And three ring types: Lua error: not enough memory.
Exclusive uniques
The following uniques were shared between Domination and Nemesis. Four unique rings: #invoke: Item table
And two unique flasks: #invoke: Item table
This unique was specific to Nemesis only:
#invoke: Item table