Demon of Dark Scriptures

Flying
When Demon of Dark Scriptures enters the battlefield, create a token artifact with indestructible called Dark Scripture.
When Demon of Dark Scriptures attacks, put a blood counter on Dark Scripture.
At the beginning of your upkeep, you lose 1 life and draw a card for each blood counter on Dark Scripture.
When Demon of Dark Scriptures dies, if Dark Scripture has three or more blood counters on it, remove all blood counters from Dark Scripture and return Demon of Dark Scriptures to the battlefi