Like I said, if you think its OP, suggest something useful, because making the skill costs 1 generic quanta wont change the card use, like hourglass and steal are still very much used, even costing 1 more.
And I see no problem about people that donates receiving a shard. Like said, in no time we will have it, Pharaoh comes last update and I have 17 of it. The problem would be giving nymphs / mark cards, that would be unfair, but its not the point, so... And in fact, I would prefer getting any other card instead, because un-upgraded shards you sell for 5 coins (or people that donate receive it upgraded? dunno), and any card would be more profitable.