There's a certain amusement to the fact that that @ hasn't worked, but I happened to check the front page at exactly the right time. It appears to be by somebody going by labyrinthoracle over on DeviantArt. I can't be 100% certain because DeviantArt is unwilling to cooperate with my computer and so I've got to use cache checks, but whatever. The individual piece's name is "Assassinate" or something if you want to go check.
Also, looks like they might have some other pieces that are good for what you do, so I guess I'll just maybe recommend looking over them.
EDIT: Well, looks like you changed it. That works, I guess.
One of jpastor’s Mystery Challenges was for me to draw or trace a snake to make a naga creature card, so I went and traced some Warcraft naga art. Thanks, I’m finding it quite funny that it’s now my most favourited card.
The submerge mechanic I created for a set idea I’m working on, an ancient underwater empire rising to the surface to wage war. By using morph, submerge, and when turned face up effects, I want to create this effect of an unknown threat being able to strike and sink back away into the ocean.