Owing to the changes in version 1.29, specifically the nerf to Shard of Gratitude, I have updated this deck accordingly. I tried it out as I had it before, but I found that the shards just weren't healing enough to be worth it anymore, and changing the mark to life is not an option. Therefore, I took the 6 shards out, and I've been looking for replacement cards.
Right now, I'm at -6 SoG, -1 Pandemonium, +1 Sanctuary, +1 Purify, +2 Mindgate (mostly for the fun factor!) +2 Shockwave and +1 Bone Wall. I also went with -2 Quantum Tower, +1 Gravity Pendulum +1 Aether Pendulum, to support the mindgates, and because gravity is often an element I'm short on.
Hover over cards for details, click for permalink
500 500 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 6qq 71b 749 749 74b 74b 75m 77f 77f 77i 77i 77i 7gp 7gp 7gq 7h2 7h2 7k6 7k6 7k6 7k6 7n3 7n3 7n7 7n7 7q5 7q5 7q5 7q5 7q5 7q5 80a 80a 80h 80h 80j 80j 81q 8ps
Sanctuary: Hosing black hole is really important in this deck, and so is healing. Initially I tried running 6 sanctuary, but I think that might've been too many. This is definitely subject to change, though, but if it does, I'd add more copies, not less.
Purify: It only heals 1 less than SoG now, and is awesome against poison. Poison is also one of the biggest weaknesses of this deck, the other being top tier rush decks. It's already been crucial in winning a couple games vs poison.
Mindgate: It's just fun, okay?
It's my favourite card and I've been dying to fit it back into the deck for a long time, but couldn't decide what to cut. It is a good card anyway, if a little slow. Providing more card advantage is always good, and getting access to opponent's cards can help find answers to problems that this deck can't deal with otherwise.
Shockwave: I added these to help in the early game. With the loss of SoGs, some of the early staying power is gone, so it needs something else. I also considered more Thunderbolts, but with the mindgates, it would have been too much aether. Shockwave also combos with Permafrost Shield, so it can be a way to kill really big creatures if they get frozen.
Bone Wall: I had this a long time ago, but ended up cutting it. I decided I'd bring it back. So far I'm actually quite pleased with it. It uses some death quanta, which was being wasted before, and it combos with otyughs, thunderbolts and shockwaves nicely. It is also helping get some EMs, which is important, because with the loss of SoGs, the EM rate has dropped for this deck.
Pandemonium: It was a nice card to have, but with the two purple nymphs, it was just too much of a strain on entropy. I thought about using Firestorm, and I still might use it, but it's undecided.
Cards I am considering using in the deck:
-more sanctuary
-firestorm
-pandemonium (if I start missing it)
-siphon life (for more creature removal and to use darkness quanta)
-improved steal (for more permanent control and to use darkness quanta; stronger now that I'll have room on my field for the permanent stolen)
-feral bond (patchx94 suggested this in chat, would work well in the late game with firefly queen)