flightoficarus (Metal Trenches)
Take a foundation of Tool, remove vocals. Add a dash of Smashing Pumpkins and Russian Circles and you've got yourself Zayn. Excellent progressive music filled with crunchy groove and wah wah solos. The bass and drums don't slouch either. Full review on MetalTrenches.com: metaltrenches.com/reviews/croatian-groove-279
Favorite track: Emperor, Guide Us.