In the same manner that Sunfall had made a comeback due to the rise of control in Standard over the last few months, Split Up could serve as a good replacement
What's not to like about an enchantment that can stop attackers, save your blockers, make your creatures invulnerable to removal, give you free morphing, and allow recursion of comes-into-play abilities -- for free
If special summoned, you can add one spell from your graveyard to your hand, or you can target one face-down card your opponent controls and banish it
Right now, before things hopefully stabilize with the addition of more population with February 20s new releases, this card is still fetching $830 on average.
For example if you attack your opponent's Blue-Eyes White Dragon with Buster Blader and they activate Mirror Force you activate this card to save Buster Blader, but your other monsters are toast