wouild probably want to run these upcoming cards from war of the sparks:
2x massacre girl (against agro just seems solid)
2x bond of revival (can give etrata haste so she can proc her attack trigger)
3x ob nixilis' crulety (premium spot removal that exiles seems good)
1-2x kaya bane of dead (removes hexproof and exiles with -3)
4x enter the god eternals (yes i would like to deal 4 dmg, heal 4, create a 4/4 and mill an opponent for 4)
2x fblthp the lost (sticky minion with card draw)
maybe even 2x kasmina, enigmatic mentor (creates chump blockers and helps cycle as well)
4x kaya's ghostform (protection for etrata and other permanents)
3x teferi's time twist (can blink etrata before damage is dealt so that it doesn't shuffle back into my deck)
1x bolas citadel