It's a great counter to any card that might win the game, and can help you win the game against something like a Thassa's Oracle combo since that user won't have a card to draw when their turn comes back around
P/T Number 328 Language English Legal Formats Commander, Historic, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Pauper, Pioneer, Standard, Timeless Rulings (6/16/2023) If you don't have an enchantment, instant, or sorcery card in your hand, you won't be able to pay Saruman of Many Colors's ward cost
Cast Yuna, Hope of Spira to cast enchantment creatures with a bonus and Summon: Bahamut to inflict widespread damage
Credit: Wizards of the Coast Saw in Half FromTheShire: More often than not I think you're going to use this to buy back your best ETB twice which is great, but in a pinch this can also save you from a big attack which is great utility