Here are a couple "Ultra-Slim" Versions:
Notes:
I tried to fit in Eternity at the cost of speed (only a single Spectre) while reducing the decksize.
Eternity is fueled by the Pendulums (activate and loop the 2nd Deamon or Flayer) - so you really can´t afford to loose a single Tower (a 3rd PA could fix this).
Only a single Spectre in there so you will have to use Eternity more often than not.You rely on Novas to play the non-
cards.
This version is relying on Butterfly Effect instead of the usual Pulvy, so its permanent control is not reliable enough (you have to draw a Flayer and BE), its still better than nothing.I would still prefer "standard" 40 card version over these.
Decklists30 card PA4vo 5if 5if 6qq 6rn 6rn 6rn 6rn 6tt 6tt 6u3 6u3 6u3 6u3 6u3 6u3 77i 77i 7ah 7dl 7dl 7q8 7ri 7ri 7ri 7ri 7ri 80h 80h 80h
Pretty much as slim as it can get. I miss the 3rd Buckler and some sort of carddraw.
31 cards Hourglass4vo 5if 5if 6qq 6rn 6rn 6rn 6rn 6tt 6tt 6u3 6u3 6u3 6u3 6u3 6u3 7ah 7dl 7dl 7dl 7q5 7q5 7q8 7ri 7ri 7ri 7ri 7ri 80h 80h 80h
This one is replacing Protect Artifact with Hourglasses and runs a 3rd Fire Buckler.I really prefer versions with PA though.
35 cards Hourglass + PA4vo 5if 5if 6qq 6rn 6rn 6rn 6rn 6tt 6tt 6u3 6u3 6u3 6u3 6u3 6u3 77i 77i 7ah 7dl 7dl 7dl 7q5 7q5 7q5 7q8 7ri 7ri 7ri 7ri 7ri 7ri 80h 80h 80h
35 cards hurts the "Nova" rate (might take too long to draw the 2 you need in time) while there is pretty much everything in this.Also it is less likly to get the Shards you definatly need.
I just felt like sharing this, up to you to fine tune the lists.