Overwhelming Remorse is currently making rounds in Rakdos decks with Mishra, Tamer of Mak Fawa commander
Leonardo da Vinci is a very strong mono-blue Commander option
Sapphire/Amethyst deck matchup guide Last but not least, lets briefly cover the matchups you are likely to face with Sapphire/Amethyst and what you can do to deal with them
Delney, Streetwise Lookout, a mythic mono-white legend from Murders at Karlov Manor, lets creatures with power 2 or less get in on the fun, doubling not only any 'enters' triggers they may have, but any triggered ability they possess
However, if All-Star Kicker was kicked, its last ability will still give creatures you control +1/+1 and haste until end of turn
Its probably always worth just damaging your opponent, rather than trying to transform cards like this