Check the tournament description to see which format is being played and choose a format that you enjoy most and that suits your playing style
Most tokens in Commander that swarm the board can be nuked with this spell, with the only things saving them being large buffs from cards like Elesh Norn or +1/+1 counters
It's even possible to play a second Shahrazad in the subgame to create Magic -ception
#9 Aura Mutation Nothing is worse than having to spend a turn and a card to destroy a Rhystic Study or Smothering Tithe
Legendary Creature Dinosaur Mutant Rare Miro Petrov 6/6 NOT LEGAL Standard NOT LEGAL Future NOT LEGAL Historic NOT LEGAL Timeless NOT LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Explorer NOT LEGAL Modern LEGAL Legacy NOT LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl NOT LEGAL Brawl NOT LEGAL Alchemy NOT LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern NOT LEGAL Predh As Indominus Rex, Alpha enters, discard any number of creature cards
This might have had as much to do with cEDH play as its Legacy success, but it'll be interesting to see if, and how much, it slumps now