Bit of help finding something if you're a fan of RWBY

Okay, I'm trying to find this fanart/mini-comic made by some person on Tumblr and basically, it's episode 7 season 2 where we see the flashback with Yang and Ruby in the wagon. And it's basically just that, but we also see Yang being all "Just a little bit more, Ruby." And then her eyes glow red, and the caption is something like "Semblance Activated."

If you guys can find this, lmk pls..