Patch 4.21 has finally arrived, bringing about tons of changes. The changes to the game itself are significant in that they crack down on teams that are, wait for it, snowballing to victory. Warwick can no longer 1-shot you with just smite and his ultimate and bug fixes for tons of champions have been released. You can look forward to a lot of awesome holiday-themed skins in the shop soon, like Winter Wonder Orianna and Snow Day Malzahar. You can read on the full patch notes here.