Or you can play this as a reasonably large 5-mana creature that still ramps
I never completed the mission, but I do have 24-year-old proof of the attempt (the starter box isnt one of my originals, but the card box itself is the original one within which I once collected all of my Mirage cards)
There are Wolves, Raccoons, Bats, Insects, Spiders, Pests, Rats, and even a few humans to be found
Cards like Ugin, Eye of the Storms, and Elspeth, Storm Slayer are immediately ones to look out for, even in their standard border card types
In D&D, your player character always chooses a background to represent previous life experiences before they became an adventurer
If I grew my cube too much more I wouldn't be able to grow the one drops at the same rate and so they would simply become even higher value