The lines are blurry
The full deck includes: 1x Foil Double-Faced Rin and Seri, Inseparable 1x Foil Double-Faced Jetmir, Nexus of Revels 1x Foil Double-Faced Jinnie Fay, Jetmirs Second 1x Foil Double-Faced Anointed Procession 1x Foil Double-Faced Sol Ring 73x Reprints 22x Foil Basic Lands with New Art 2x Double-Faced Tokens with New Art 11x Reprint Tokens 3x Double-Faced Display Cards You can check the full decklist over at the WOTC blog
Instead, it fits into Aegar's Izzet (blue/red) color identity by rewarding you for dealing excess damage with some extra card draw
I theorized that like demons on Innistrad, angels might overcome death by in time rematerializing
Only time, and the ever-vocal MTG community, will tell
Due to the want to reprint, but not to blow up the market, Wizards makes similar lands to help lower the value of some of the cards, but not destroy the collectability