I love the Eyes To Kill Eyeshadows, the are just incredible. The sparkle, the wear time, the colours. I don't love the hefty price tag so much but I think they are worth it. I had a House of Fraser voucher for my birthday so when there were new shades released as part of the Summer Collection I knew what to use it on.
I only went in for one but ended up with two.
Number 20 - Obsidian Black, is a gorgeous blackened teal
Number 23 - Madre Perla, is a white based duochrome with green and pink running through it
Unfortunately both of these colours are difficult to capture in their full beauty on camera, so I'd recommend trying them out in person.
Here are some pics, swatches and a quick look I did using them both: