Looking over the entirety of the card list, it really feels like blue and green are the big winners for Energy
Rather, a second "reflexive" ability triggers when you sacrifice another creature or enchantment this way
Lorescale Coatl is a Simic card that grows anytime you draw a card
As time goes on the power of this card will only grow as well, it's very common for something like this to be printed and languish for a little while until something else releases that turbocharges it and then suddenly it's really good
Though there are lots of good cards in Aftermath, this is one of the frontrunners for the most desired by the community, and could skyrocket in popularity when it launches
The weakness here is that your opponents know you are most likely to cast your biggest spell first, and that knowledge will make them want to counter your first spell