Shadowborn Demon

A 5/6 flyer that kills a creature on entry is a rate that should warp any board it lands on. The recurring upkeep tax is the bill that comes due: if your graveyard isn't stocked with six creature cards, the Demon makes you feed it, sacrificing one of your own every turn until the yard fills up. That clause flips the card's natural home. The instinct is to play it in a clean midrange shell, but a clean shell is precisely where the upkeep trigger turns against you, thinning your own board while you wait. The card wants the opposite: a deck already piling creatures into the graveyard, where the demand for six bodies is satisfied as a matter of course and the sacrifice becomes a benefit rather than a penalty. That makes it a graveyard-payoff card wearing the costume of a beater, a Demon that punishes the player trying to keep its bargain at face value and rewards the one who was never going to keep a tidy graveyard anyway. The lineage is the old tradition of demons that ask for blood: powerful bodies leashed to an upkeep cost, from Lord of the Pit forward. This one's leash is unusual in that you can simply outgrow it, and the build that does is not the one the stat line first suggests.