Given this lets you sac Zombie tokens instead of a real creature, its very easy to feed, say, a bundle of decayed tokens to this spell and suddenly find yourself with a winning combo on board
This keeps repeating turn after turn until our opponent draws an answer to Archangel, so it definitely applies a lot of pressure
This angel commanders kit revolves around bringing your nontoken creatures that die back to life while simultaneously exiling the creature your opponents control
You can get around this by running plenty of free instant speed sacrifice effects, which is pretty easy since black is loaded to the brim with these types of effects
Reds entry, Season of the Bold, does a number of very red things
If these cards are seen as an attainable, albeit unlikely goal, more players may be encouraged to open them