Black already gets the B, so blue uses the U in its name
On the one hand, they all have incredibly powerful upsides that could easily be abused in the right decks
The characters on the front of the box are also guaranteed to be Foiled, meaning players will get Foiled versions of Moana and Mickey Mouse, Wayward Sorcerer
Bello, Bard of the Brambles is a Gruul (red-green) legend from Bloomburrow that encourages players to pack their decks with as many cheap ramp spells and expensive artifacts and enchantments as they can, in large part because of his powerful static ability: during your turn, every 4 cost of greater non-Aura enchantment and non-Equipment artifact becomes an indestructible, hasty 4/4 Elemental creature, ready to smash face
Every face down monster is flipped face-up, and you inflict 500 burn damage to your opponent for every effect monster on the field so this can be up to a ridiculous 6000 LP hit
That's four turns of Time Ebb plus blocking - and losing that many draws in a row while your opponent continues to develop their board will not lead to many victories