But what will work with the new game mechanics/shards?
Would be grateful for recommendations. 
Yo i have yet to test and of these ideas but i have some early thoughts on how to make some decks with the new shards and changes. With shard of bravery, you have to have mark of
to get max efficiency, so immolation rushes or other fire rushes/stalls may become much more powerful and take even less ttw. The idea of brave instosis (instosis using shards of bravery instead of electrum hourglasses/sundials) has also been posted, mainly to evade enemy PC, which could be very useful against the meta in the arena. With shard of freedom, I have been thinking about using diving creatures such as elite wyrm and skyblitz, but with the added benefit of stacked SoF's. Alternatively, chaos power rushes with dragonfly's, sky blitz, and SoF may become even quicker and take less ttw. Shard of focus can be used in decks that otherwise have no PC, and would particularly synergize with mono gravity decks, or discord/BH decks, as the shard of focus can eventually give you another black hole to use while also destroying pesky permanents. As i said, these are all early ideas, and i haven't given any thought to shard of wisdom or integrity, but hope this helps.
