If I wanted to do this, Id start with a vanilla that could end the game via commander damage, so 3-Hit Club members like Yargle, Glutton of Urborg, Terrian, World Tyrant, or Kalakscion, Hunger Tyrant
Both are powerful enough on their own, if you get both at once or pair one with some Blood Artist triggers then you are getting a lot of value and progress towards your win
We've made first contact with Magic: The Gathering | Star Trek
X = 3 is already amazing - you get 9 power for six mana across three Creatures - but dialing that up makes him absolutely nuts
There are 45 fox creatures in Magic so far, a good saga that flips into a fox (The Restoration of Eiganjo), and two cards that reference foxes in some way (Patron of the Kitsune and Genku, Future Shaper)