It's cool to see Magic: The Gathering continuing this trend of using the number seven in its mechanics for Final Fantasy 7 characters, as it's a solid nod to the precedent set by the original game
It creates Blood Tokens when your nontoken creatures die, uses those tokens to transform, and then turns those tokens into attacking 2/2 Bat creatures
The leads us down a whole flashback line, which probably includes Snapcaster Mage
Use these chaos commanders wisely
This is pretty dang easy to do, and giving Enchantress decks access to a repeatable Replenish might even be better than just playing Replenish itself
Duplicate protection has also reportedly been beefed up so that, once you've scooped one of every Rare card in Alchemy: Innistrad, the Rare slot in subsequent boosters will give you an uncollected Rare from Crimson Vow instead