It's Scourge form his upcoming manga, The Rise of Scourge! And why is the title "Tiny Scourge"? Because....his kittypet name is Tiny!
I like some of the panels a whole lot, so I'll be coloring them with OpenCanvas and putting them up here.
Lineart (c) The artist. I'm so sorry, I completely forget her name. But she's brilliant.
Coloring (c) Me
Tiny/Scourge (c) Erin Hunter