The person who cast the aftermath spell must pass priority to anyone who wishes to respond like any other spell cast in the game
Boom // Bust: We play Boom // Bust over Stone Rain or Molten Rain for the same reason Todd Anderson packed Spreading Seas over Blood Moon in his Temur Delver sideboard: its just faster
The elemental incarnations, and the Theros titans (such as the recent Phlage, Titan of Fire's Fury), have triggered abilities that cause them to be sacrificed after they enter the battlefield unless they've been cast a particular way
Its like how sometimes Affinity can equip a Cranial Plating before Stony Silence hits play, but usually the hate card means game over
Its especially good for cards that shine under close inspection , like clean holos, playable staples, and mid-to-high-value rares
You can then take a land from your hand and put it into play