Oni

Hexproof
As an additional cost to cast this creature sacrifice
a 1/1 Human creature token
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Lock the door, blow out the light; The hungry Oni
haunts the night. Hide and tremble little one; The Oni
wants to have some fun. Hear it scratching at the
door; See its shadow cross the floor. The sun won't rise
for quite a while; Till then, beware Oni's smile.
- Children's Rhyme