Hey, you asked for more transparency, so theres a good window into my head (note that the rest of the RC may not share my views on this particular subject)
Archangel of Wrath actually has two kicker costs, and you can pay either of them, both of them, or neither of them
Having previously published two editions of monster-building tile-laying game Hideous Abomination under label Tettix Games, Cowan plans to crowdfund Deep Regrets with a Kickstarter campaign this June
We can assume these will both be tribal decks too, albeit with a focus on whatever keywords will be applying to Spirits and Vampires in the next set
It amplifies damage dealt by your other sources while also dealing damage itself, it has lifelink, and it plays exceptionally well with burn-based spellslinger payoffs like Electrostatic Field and Guttersnipe