Since you are using 12 shards that all give lots of card advantage, why not add a SoI that can convert the card advantage into a powerful creature? Just an idea; i have no idea how well it would work in this deck. And how about a mutation for possible singularities or weak creatures/powerful creatures of the opponent. I think a single copy of those cards could already have an high impact on gameplay and they shouldnt hurt the RNGfun; however I am unsure whether they would actually help.