Full article is here.

Stuff of note:
  • Xerath rework
  • Heimerdinger rework
  • Sivir's new ability icons
  • Ahri nerfed
  • Corki and Tryndamere slightly nerfed
  • Mana cost reductions; most noticeably on Solar Flare, Chaos Storm, and Wish
  • Tormented Shadow is now an execute what.
  • Two new Xerath items: Chancellor's Staff and Emperor's Sceptre; both of which are blatently overpowered

The most interesting things to me are the Xerath stuff. The new items give 100 AP, Mana Pulse active (senses nearby enemies), and 50% magic pen what the ****. Emperor's Sceptre also lets Xerath hit level 20 what the ****.