Flying
When this creature dies, each opponent loses 2 life and you gain 2 life.
If your life total is brought to 0 or less at the same time that Nocturnal Feeder is dealt lethal damage, you lose the game before its ability goes on the stack.
In a Two-Headed Giant game, Nocturnal Feeder’s ability causes the opposing team to lose 4 life and you to gain 2 life.