His desire for knowledge is reflected by his triggered ability, which checks to see if you have an Instant or Sorcery on top of your library during your upkeep
It relies on casting a number of (cheaply-costed) walls and other creatures with high toughness, and then using Phenax's ability to mill your opponent for a huge number of cards once you have a wall of creatures in play
Arcane Proxy landed slightly below my number one choice due to my focus on Standard, where it will see competitive play
For discard decks, force opponents to challenge characters like Cursed Merfolk, Fred Mascot by Day, or the trusty old Flynn Rider Charming Rogue to get full use of their abilities
This ones particularly terrifying to deal with for unseasoned players and a prime reason why it ranks among the best colorless creatures MTG enthusiasts debate endlessly
What better way to show off your style or things you care about than making proxies