Yuki, the Blood Artisan

Double Strike
Whenever a creature dies, create a Blood token.
If you sacrificed the creature, create two instead.
Blood tokens you control have the additional
ability: "{t}, Sacrifice this artifact: Add {b/r}, then
Discard a card."
"Blood is often wasted, spilt by those who want to
destroy. I use blood to create, as the paint for my art!"