blood petal celebrant has first strike as long as it's attacking. (it deals combat damage before creatures without first strike.)
when blood petal celebrant dies, create a blood token. (it's an artifact with "1, t, discard a card, sacrifice this artifact: draw a card.")
when blood petal celebrant dies, create a blood token. (it's an artifact with "1, t, discard a card, sacrifice this artifact: draw a card.")