It can allow decks to pop-off quicker, which hopefully does the job of balancing the metagame, and not just walling out archetypes completely in the same way a card like Fury did in Modern (nuking mana dorks and other go-wide decks for no mana)
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it's a sorcery, but it lets you dig 2 or even 3 cards deep and set up your next draw or 2
This allows reanimator decks to have access to massive, game-winning threats within the earliest turns of a game, completely subverting the mana costs that keep powerful creatures in check Through the likes of massive creatures such as Angels and Demons, both white and black have no shortage of excellent reanimation targets
Unfortunately, my Space-Time Smackdown situation is far more dire
Usually its Karn or Ugin in that space