A new exploit has been discovered in Diablo III that makes Wizard characters essentially invincible. The exploit reportedly works for both Softcore and Hardcore characters, which has some players up in arms and others scrambling to complete Hardcore more before Blizzard issues a fix. In the meantime, Blizzard has been removing forum posts that mention the exploit in a effort to keep the amount of people using it in-game to a minimum.
The exploit is performed by using the Wizard's Teleport and Archon abilities in quick succession. One poster on the Blizzard forums listed the steps required to make this exploit work, but Blizzard has since removed the step-by-step guide to making your Wizard invulnerable. Kotaku managed to swipe the list before Blizzard moderators were able to take it down, however, so here's what you need to do in order to enjoy a risk-free romp through Sanctuary:
Step 1: Select Teleport - Fracture. Bind it to a key
Step 2: Select Archon, tested with Improved Archon
Step 3: Hover your mouse over or near your charcter
Step 4: Press Teleport
Step 5: QUICKLY(!) Press Archon
Many other posters in the thread have confirmed that the exploit works, and though some say that it takes a couple of tries to get the rhythm down, pulling off this exploit is apparently pretty simple once you get the hang of it. As with other game-breaking exploits and bugs in Diablo III, Blizzard will likely push a fix out the door quickly, so if you're planning on making use of this particular exploit, do so with the knowledge that it probably won't be long before Blizzard fixes it.