Eredan's World

See, there are several useful common cards across all Acts.

I don't agree with this clunky sollution.

The best way is to simply implement that idea of recycling 2-3 cards into 1 of same quality and 5 into 1 of above quality.

Would be nice.
There's a similar system in League of Legends for Runes
There are Tier 1, 2 and 3 Runes.
- Mixing 3x Tier 1 Runes, gives you 1x Tier 1 Rune.
- Mixing 5x Tier 1 Runes, gives you 1x Tier 2 Rune.
And so forth.

Could be similar for Eredan:
3x Common = 1x Random Common
5x Common = 1x Random Uncommon or 2x Random Common (50/50 Chance)
3x Uncommon = 1x Random Uncommon
5x Uncommon = 1x Random Rare or 2x Random Uncommon (50/50 Chance)
3x Rare = Random Rare
5x Rare = Random Legendary or 2x Random Rares (50/50 Chance)
3x Legendary = Random Legendary
5x Legendary = 2x Random Legendaries

Exploit, Collector and Mythical cards that you do not already have could be among the possible results.

Mixing different rarities would either:
a) not be allowed; or b) count as the lowest rarity used (so Common + Uncommon + Rare = 3x common = Common)

What about [card]Lightning Bolt[/card] lvl 3 combine it with Erien 's huge spirit .

You should be able to do both (untap a tapped char, or tap an untapped one).

At least spice things up for efforts. Like

Win > 10 = favors
win 10-20 = Common
win 20-30 = Uncommon
win 50 or more = Rare

Or if you hit so many wins reward with a random card much like they do for the random card pick for the daily game play.

You know, nothing would be more rewarding as a forum user than knowing one's ideas are used, and accredited.

There's this game where players who report meaningful bugs in an organized manner, are rewarded in-game.

When a card is inspired on someone's suggestion, that someone should get 1 copy of that card as a reward.

It fosters community and meaningful posts.