A single black pip for Sifter isn't too steep a price like Smothering AbominationSmothering Abomination feels like it might be, and as much as I've tried to lean away from it, I haven't forgotten how good having a storm of Annihilator 1 Eldrazi Scions is
Exchange cards can work too, as long as they're not the life exchanging kind
Create a 2/2 green Bird creature token with "Whenever a land you control enters, this token gets +1/+0 until end of turn." Flashback (You may cast this card from your graveyard for its flashback cost
Palantir of Orthanc extended foil: Around $100 Prerelease foil: Around $30 Borderless poster foil: Around $40 Borderless poster non-foil: Around $19 Palantir of Orthanc extended non-foil: Around $15 Palantir of Orthanc foil: Around $16 Palantir of Orthanc normal: Around $13 Witch-king of Angmar MTG price Popular in the Commander format, Witch-king of Angmar is a five-drop Mono-Black legendary
Admittedly, this is a six-drop that, realistically, is going to have to survive the turn cycle in order to do its best work