It's the aggro of Boros combined with efficient triggers and the removal and life drain of black mana
This is also the first time you can getll be able to get Tymna in non-foil, which is great for those wary of card curling
Gift of Doom doesn't cost any mana to turn face-up and can save one of your creatures while you're completely tapped out, something your opponents won't anticipate often
But when the battlefield clogs and the skies fill, the ability to take down a massive threat from orbit becomes absolutely crucial, especially in Sealed Deck
While it can take a while to get to three energy counters, spreading +1/+1 counters to all of your creatures can slowly turn them into massive threats
You might mix and match to spread out lights across your entire attraction deck, but one copy of it isnt better or worse than any other version