Above-rate flample with protection and no downside? This is at least a limited B.
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flample
I love it
As a commander there are a few dozen cards in black that give all creatures -2/-2 for the turn or something similar; turning all of those into 1 sided board wipes with this bird out.
I've always had a fondness for Night of Souls' Betrayal.
A solid choice!
I've found Screams from Within does a situational similar thing without having people be prevented from wanting to fill the board.
We've come a long way since the beloved Spirit of the Night, this is 4 mana less and has some decent removal built into it. I think Maha is a lot better sadly.