Disclaimer: I do not own RWBY or Assassin's Creed. I do, however, own my OCs: Shadow, Jason, Chad and Will

Hundreds of Grimm crowded around a manifestation of dark energy. A gateway to another world. Blue lightning forked out of the purple swirl of the portal, latching on to anything it touched and sucked it into the unknown on the other side. Beowulfs howled into the night at this spectacle.

A flash of red and a Grimm lost his head.
A flicker of white denies him his might.
A blaze of yellow before he could bellow.
A swish of black and he'll never come back.

Ruby's scythe, Crescent Rose, cut through Grimm like wheat on a farm, Weiss's rapier, Myrtenaster, stabbed Grimm through their guts, Yang's shot gauntlets, Ember Celica, pounded Grimm to nothing before her, and Blake's Gambol Shroud sliced them down like they were nothing.

"Does anyone else think that this is getting way too easy?" Ruby yelled as she fired a final round into the last remaining Grimm in the area. Doctor Oobleck zoomed ahead of the group and came to an abrupt stop in front of the portal. "Fine work girls. Now, let's see what's going on here!" He extended his hand towards the purple swirl and just as his finger tips skimmed its surface, 4 figures flew out of it, landing painfully. "OOOWWWW!" screamed one of the shadowy figures as the portal closed behind him. "Errr..." Yang responded "Who are those guys?"

Shadow, Jason, Chad and Will flew through the hazy black mist before flying past a shimmering purple barrier and over the heads of 4 teenage girls and a young man. Chad screamed out in pain as the purple barrier shrank to nothing behind him. Jason rushed over to check that Chad was okay to walk and only then did the group notice the 5 pairs of eyes glued to them. "W-well..." Will stammered, "T-this is awkward..." A young girl, the youngest by the look of them, wielding an oversized scythe exclaimed in a childish manner, "Oh my GOD! Aliens!" At this, Chad snapped back "Who in the hell are you calling an alien?!" As the young girl's weapon transformed into a sniper rifle before Chad's very eyes, he swiftly apologised to save his own skin. Then he noticed Jason and Will looking at their limbs in turn. He checked his own. "Oh my god! I'm a kid again! Yey!" Only Jason noticed Shadow sneaking into the darkness... He grinned broadly. 'Now let's even the odds...'