Nesting Bot is in Standard right now, for example, and makes this look incredibly weak by comparison
While zombies and vampires are also iconic in black and more common overall, demons are usually rare and mythic rare creatures, like dragons among red creatures and angels among white creatures
Much as this is a flavor fail, it makes the card a lot more playable
I tried out different numbers and amounts of life loss, but the Sleeper Agent problem was quite real here: it was hard to get this at a rate where it was fun while encouraging you to keep it or give it away in different games
A 4/4 for 6 otherwise isnt very good, even with a mediocre board wipe
While there are ways around having to pay the full cost, it would be much easier to lower the cost overall