This is far from the most powerful or efficient removal spell that black has, but it is a good way to deal with a threat and get some life back to boot
Plus, it has lifelink, and whenever you attack an opponent, theyll discard a card to further grow this vampire
You can jump through hoops to refill off of Pursuit of Knowledge or Well of Lost Dreams, but your best source of multiple cards in a turn (cycle) remains the expensive white draw options
You also don't want to waste spells on your opponents' turns when possible, because churning out these Elemental tokens is quite key to victory
Cyan, Vengeful Samurai* Part of the Final Fantasy 6 Commander deck, Cyan here can come down as cheap as 1 mana, and provide a growing double striking body for white inclusive recursion decks
It has great colors for interaction, so swap in what works best for you, and maybe that's more removal for potential blockers or more bounce spells