This is really awesome, I'd love to see more like this or even more of the celestial sentinel (great name btw, catchy!)

Tehe guard the ancient anals.

But seriously, awsome art! Great use of contrast between both colours and geometry. Between the red and black contrast, the suprizingly effective contrasting and complimenting of the pale bluish green, and the sharp, clean geometry contrasting the organic tree-like shapes. Great job!

Cthulhu head-lookin' ass.

Truly amazing, I wish to congratulate you on such a marvelous piece.