We abuse the powerful shadow threats to stabilize and eventually take over the game against aggro. Against other decks we try to curve out with pressure and then beat face while we keep the board clear. While we're primarily Shadow we have the option to transform From Beyond later on into a very powerful threat which is a boon. Plus access to cylixes is nice, however you could just run sigils if you prefer to avoid sometimes having clunky hands.
The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.
I probably should have removed it after the deck tech. I posted this list initially on warcry as a proof of concept and then updated the list after streaming and tuning and created the videos.
From Beyond
x4
1
Shadow Etchings
x4
2
Annihilate
x4
2
Damara, Deft Saboteur
x4
2
Devour
x3
2
Makkar's Quiver
x3
2
Petition
x4
3
Blightmoth
x4
3
Devouring Shadow
x2
3
Marionette Cross
x4
3
Unseen Longbow
x2
4
Eremot, Mindsplinter
x4
4
Wasteland Broker
x2
7
Icaria, First Reaper
x4
7
Severin of the Dark
x2
Shadow Sigil
x6
Argenport Cylix
x4
Justice Symbol
x1
Seat of Mystery
x4
Seat of Vengeance
x4
Shadow Symbol
x1
Time Symbol
x1
Xenan Cylix
x4
View Deck on Shiftstoned
Either way, cool deck and nice idea with the power base.