I’ve really been liking this deck so far. I made the following changes and have been winning in most match-ups (Rank 5-10 range):

-2 Sunfury Protector
-2 Mad Hatter
-1 Swamp Ooze
-1 Scaleworm
-1 Toki, Time-Tinker

+2 Saronite Chaingang
+2 Arcane Keysmith
+2 Direwolf Alpha
+1 Lich King

Book of Specters + Archmage Arugal and/or Mountain Giant is an absolutely bonkers combo. I think it’s possible this deck may also want a copy or 2 of Flamestrike to give the Spiteful Summoners another decent target.

Been having a ton of fun with this deck. Currently 18-4 in the rank 10 range. The deck manhandles pretty much everything on ladder aside from Cubelock (surprise surprise). The Umbra combo is nuts if you can hit it but that part of the deck is so inconsistent I’m considering dropping it for another Grimestreet Enforcer or silence effect.

Some personal thoughts on mulligan strats:

-Always keep Val’Anyr

-Prioritize having a 1 drop

-Always keep Call to Arms

I found that more or less sticking to that will give you some solid results.