What does Voldaren Bloodcaster do?
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Flying\nWhenever Voldaren Bloodcaster or another nontoken creature you control dies, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")\nWhenever you create a Blood token, if you control five or more Blood tokens, transform Voldaren Bloodcaster.
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