Awaken the Blood Avatar

As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way.
Each opponent sacrifices a creature.
Create a blood avatar token

"One, two, Freddy's coming for you. Three, four,
better lock your door. Five, six, grab your crucifix.
Seven, eight, better stay up late. Nine, ten,
NEVER SLEEP AGAIN!"