2021-11-19 : Blood tokens that become Bats with Bloodbat Summoner's ability are still artifact Blood tokens and still have “{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.”

2021-11-19 : Voldaren Bloodcaster's last ability checks how many Blood tokens you have both as it triggers and as it resolves. If you don't control at least five Blood tokens at both of those times, it won't transform.