Cards similar to Creakwood Liege include Sporesower Thallid, Tendershoot Dryad, Sporoloth Ancient
Graveborn Muse has the potential to be several Phyrexian Arenas taped together (although watch out in Zombie decks that it doesn't kill you), and Underworld Connections is basically a Phyrexian Arena that just asks you to sac a land when it enters
Eventually, I ran mpc-autofill directly from the script so I could pause it to log in, and then to save the order when I was done to avoid this issue
Things like the percentage of time you'll see certain cards or rarities, or whether certain types of cards show up in certain slots
This is Esper, so you get three options for colors in your Commander deck
Its valued at around $120, but its actually selling for a little less than that if you look around