Momentum Breaker Ive said that Grim Bauble would be a good addition to UB decks, but what about Momentum Breaker
Multiplayer games give cards time to generate value, which is why things like taxes, board wipes, and long-term engines shine there
Im not going to fight you if you think Timetwister deserves the top spot, but maybe there's a good reason we call these effects wheels and not twisters. Best Wheel Effects Payoffs Wheels serve as support pieces for tons of different strategies, to the point where there are entire decks best classified as wheel decks. Most obviously are effects that care about drawing cards
After it triggers in your upkeep, you can look at the top card of their library and you can cast it with your mana as though it were mana of any color, so if you flip over Lightning Bolt you can tap an Island and cast it
If my opponent is well prepared to fight my creatures (End Hostilities is a card that often gives me problems), a Planeswalker like Nissa is a great way to catch him or her unprepared
Crayons (AKA Drawing with Colors) Just like you dont have to play green to achieve the right amount of mana, you also dont have to play blue to find satisfactory card draw options in the format