Patch 3.0 for Heart of the Swarm is out - unlocks Whispers of Oblivion for everybody

The last part of the StarCraft II trilogy, Legacy of the Void, will be out in a little over month's time. In preparation for the release, Blizzard have now updated Heart of the Swarm to 3.0. The patch brings with it not only a whole lot of changes and fixes to the RTS, but also unlocks Whispers of Oblivion for everybody to enjoy.