With the upgrades taken care of, heres what we cut to make room: Communal Brewing Steelburr Champion Rites of Flourishing Intellectual Offering Tempt with Discovery Coveted Jewel Swords to Plowshares Chasm Skulker Realm-Cloaked Giant Farseek After those cuts and additions, heres the list we end up with
Four Knocks is the white Phyrexian Arena
Luckily, the creature also has Evolve, so powering it up a bit should be fairly easy
Given that he only has a printed Strength of 1, and 1 Willpower too, he definitely requires assistance from creative players
Commander players often dont pack much in the way of graveyard hate, so Im all about cards that can come down early to deal with reanimation targets and the like and then provide a big upside later in the game
That synergy is nice, but the real benefit is simply getting two enters effects for the cost of one card and a bit of extra mana