Blood Seal Ritual

Blood Seal Ritual enters the battlefield with 5 blood counters on it.
At the beginning of your upkeep, any opponent may sacrifice a creature. If no one does, remove a blood counter from Blood Seal Ritual.
When the last blood counter is removed, sacrifice Blood Seal Ritual. If you do, create a legendary 20/20 black demon creature token with trample and indestructible named The Awoken.