Advanced Ice Books

So today the shop updated, the sale had all advanced ice skills for sale except for avalanche and absolute zero. Both of which I already own. So which one should I buy, chill, snowflakes or borealis? It's for a Trunky by the way, with magic force, I don't think I'll get a Fenrir. And does chill actually reduce speed?

By the way is the shop different between servers? I saw a post saying PoD wasn't put on sale yet, but for my server at least it was sale for a day or two- during the time the shop didnt update.

Yes each server is different. s2 had PoD on sale the 1st day when others didn't.

S 11 hasnt got Pod yet.. Boreals i good in blizzard.. And snowflakes good only for frost auro 3 skill.. Can one hit draco i heard.. If hp is below 30%.. But if u dont want any side effect then chill the best..no need of blizzard..

PoD just went back on sale on s2 again. So hopefully you guys will get it soon.