There's not better place to start than what many consider to be the rarest Pokmon card in existence, the Pikachu Illustrator holo
Like other skinned cards, this is mechanically considered Yoshimaru despite the different name, meaning you can only play up to four copies of either card in your deck (or just one in Commander)
At such a low CMC, Shardless Agent allowed players to build their deck in a streamlined way where you knew what you were going to cascade into
COLLECTOR BOOSTER-EXCLUSIVESCollector Boosters are the only boosters that may contain cards featuring certain special foil treatments and may even contain an ultra-rare headliner card
But if you have a Command Tower, which makes mana depending on your commanders color identity, you have access to all the colors you could possibly need
The two of them combined with Kelsien have the potential to create all kinds of mayhem