Arcane Reach allows you to target a close burst or blast starting 2 squares away from you.
Thunderwave pushes each target in a close blast 3.
The wizard chose his origin square and wanted the thunderwave to point back at himself. Is this allowed? Or is the push still determined from the wizard's square?
As to why? Well, he desperately needed to get out of his own Wall of Fire. Kids, be careful around fire!
Best Answer
The consensus on the forums seems to be... unclear. I think the best response is this post:
Which also supports logic "origin from any square 2 squares away, thus you can attack yourself from the target line: Target: Each creature in blast, as you're a creature.