It worked well in the one master's gauntlet I ran it through. Seemed consistent, and Nightmaw, Sight Unseen (a guilty favorite of mine) won the boss's board stall (Labyrinth Treasury.) Didn't seem hurt by the exclusion of Dark Return.
As always, try it out and let me know in the comments how my deckbuilding brings shame upon my family name.
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.
Worth noting that if new Eremot gets screamed and then transforms, the relic still gets sacrificed, that interaction could be unintuitive for some people.