Outer sleeves: Just about anything will do here so long as theyre newish, clean, & not too tight or too loose
Lutri can't be used as a companion, but it can appear in your deck or be your commander
I could see this working alright with Clan Crafter as your background, making your commander a cantrip that can draw more and more cards each turn
#4 Gwen Stacy // Ghost-Spider Gwen Stacy Marvels Spider-Man, Mythic Gwen Stacy is one of the few cards that comes with a second side, where shell exile the top card of your library as she enters, and you can play that card for as long as you control Gwen Stacy
There are four to choose from, so which is best for you and your playstyle
We arent going to ruin the joke here since its a bit of a visual gag, so just check the card out