Shards

What can I purchase with shards? A part for expeditions and cosmetic stuff. No way to purchase cards? tks

You can craft specific cards with shards.

How ? when I go to the store I can only use coins ...

you don't go to the store silly, you go to your collection, select "show unowned" and then you can craft any card you like

Legendaries cost 3000 for example (although that amount of shards is better spent on expeditions tbh)

Quote From YourPrivateNightmare

you don't go to the store silly, you go to your collection, select "show unowned" and then you can craft any card you like

Legendaries cost 3000 for example (although that amount of shards is better spent on expeditions tbh)

This.  Or even if you own the card but want additional copies.  Just right click on the card you want to craft.  While you're there: click on the eye at the bottom right: you'll see the card's full artwork, which is usually really cool but so big that the card face only has room from a small cropped version.  (My personal fav is Shark Chariot: did you know there's actually 3 sharks, and they're pulling Hecarim along?)

I would also argue that buying a specific Legendary could be better than buying an Expedition run and getting a random Legendary.  All depends on your situation: how good you are at Expeditions, what constructed decks you want to play, what's in your existing collection, etc.

Quote From sinti

Getting an Expedition entry instead of a Legendary is really good when you're just trying to grow your collection, since the Legendary will cost you less than 3000 shards guaranteed. Ofc if you want a specific one, crafting it is probably going to be the best (not counting wild cards)

You're assuming you get at least 5 wins; for 3 or less, you only get the random champion and a small refund on your shards.  Specifically, its either 4000 3000 shards to craft a specific champion or 3000 shards for a run with the following payouts:

• 0 Win:   Champion Card and 100 XP
• 1 Wins: Champion Card, 150 Shards, 300 XP
• 2 Wins: Champion Card, 350 Shards, 500 XP
• 3 Wins: Champion Card, 600 Shards, 700 XP
• 4 Wins: Champion Card, Bronze Chest, 600 Shards, 900 XP = at least 1 random Champion, 2 Common
• 5 Wins: Champion Card, Silver Chest, 600 Shards, 1200 XP = at least 1 random Champion, 1 Rare, 2 Common 
• 6 Wins: Champion Card, Golden Chest, 1000 Shards, 1500 XP = at least 1 random Champion, 1 Rare, 4 Common 
• 7 Wins: Champion Capsule, 3500 Shards, 2000 XP = at least 1 random Champion, 1 Epic, 3 Rare

Quote From OldManSanns

Specifically, its either 4000 shards to craft a specific champion

I believe champions are 3000 shards apiece since the open beta launch, no? So they're still identical in price to an expedition.

Champions cost 3000. I believe it was 4000 in earlier stages of development as I have seen sites mention 4000, but I started playing 2 weeks ago, so don't quote me on this. My first expedition was a disaster. 2 trials of 0 wins. LOL. At least I got a champion I didn't have. If someone has an almost full collection, then ending an expedition with 5 wins (or even 6) is barely worth it. Of course, you also gain experience with the game and you get to play with cards you don't currently own, so there's that. Right now I am staying away from them until I become more experienced and I'll just keep hoarding tokens from the weekly vault.

TKS

btw with 3000 shard I prefer select a champion instead to get a random one ...

You gentlemen are correct; I was thinking it was 3000 but am at work so I double-checked online and found what I presume to be a stale article stating quoting 4000.  XD