That's Buscando Azul and I will be using it to make Vaila. I had a lot of trouble finding this colorway. The only store who had 8 skeins of it was Diva Knitting (run by Kemp, one of the mods here). It was actually quite cheap for Malabrigo.
I decided to swatch last night and found that Malabrigo is quite difficult to get wound. It wants to stick to itself (well, I would too if I were so soft and lovely and BLUE!

). So I had to spend about 30 minutes untangling a huge yarn mess and then wind the ball by hand. It was worth it though!
I noticed this colorway doesn't look as variegated as some of the ones I've seen before. That's actually a good thing since I probably won't need to alternate skeins for my sweater!

I made a scarf with Purple Mystery before and I did have to because the skeins were quite different.