Patch 5.4 has come out.

Champion highlights
Janna passive change. No longer grants passive movement at all times, but only when allies are moving towards Janna do they get 8% movement speed.

Kassadin ultimate range has changed from 700 to 450

Skins
DJ Sona



Riot writes:

Hello Summoners,

Welcome to patch 5.4 - the one where we follow up on patch 5.2 with some mage love. Up front: the new +120 AP item is currently slated for a future patch (soon(tm)), but this hasn't stopped us from working on the few mages that needed help in a post-DFG world. Actually, like we mentioned in the patch 5.2 foreword, the impact of DFG's removal hasn't been all that noticeable in champion performance, but there were two we knew would have identity crises (that's the plural) in the aftermath: Mordekaiser and Veigar.

When we went into deep examination of what made Morde and Veigar who they are, we realized that a lot of their identity came down to "blow this fool up (and get a ghost!)." Unfortunately, amping up a play pattern like that makes for some sad times in the world of counterplay, so we had to take a longer look to see what could be done. Ultimately we'll explain more in their individual context paragraphs, but the rundown of the issue is this: when a champion is tuned around a fine line between "functional" and "oppressive," balance isn't a question of number tuning; rather, it's all about finding a healthy direction where that champ can prosper without getting paranoid about fame. Can you imagine a world where Veigar is the best - and most popular - champion in the game? That's a tough vision to sell for his opponents, and we want to make sure his success is warranted. Check out those contexts for more information, but this is an important philosophy to keep in mind as you read through these notes!

And that's it for this patch foreword - best of luck on those fields of justice. As a random tip for success in your solo (or duo!) queue adventures, remember that sometimes it's better for everyone to do the wrong thing in perfect harmony than for one guy to do the right thing in angry isolation. But that's only applicable for a team game of League of Legends and is probably incorrect for anything else. Sorry.

- Chris "Pwyff" Tom & Patrick "Scarizard" Scarborough
http://euw.leagueoflegends.com/en/news/game-updates/patch/patch-54-notes