Regardless, like others mentioned above, whether there are just 50 or 500 copies in existence, they are very rare cards with almost no supply but a reasonable[1] amount of demand
These new Witherbloom cards embrace the idea of life as a fluid, transferable resource, embodying a fine control over the barrier between life and death
As a split card counts as two cards with two separate names, if there is an effect that makes you choose a card name, you can choose one of the card's names and the effect will only take place on that card instead of both of them
The deck also utilizes Amped Raptor to convert the Energy you've accrued into free cards off the top of your library, allowing the pilot to snowball into massive board states that cheat on mana while building up the deck's Energy reserve
You can remove three +1/+1 counters from Runaway Steam-Kin to generate three red mana
Like Charms or Commands (Such as Ivory Charm and Primal Command), split cards tend to be about having a bunch of options, so you have diversity and utility built into your decks