Once you have the total CMC of the nonland cards in your deck, the next step is to divide this number by the number of nonland cards in your deck
I make way for a steady mana base, ye trusty ol blue and black and hopefully that gives us some advantages regarding stability, but we have also given up some colours doing it, which mostly means no red and no Stronghold Gambit or Pyroblast in the sideboard
Double mana changes everything
The short of it is that you can exile her at the beginning of your upkeep, and then whenever a land enters, you can either bring her back or put a voyage counter on her
Most importantly, its a mono-white Creature that shuts off free spells like the Evoke Elementals from Modern Horizons Two
With the living weapon ability, it creates a creature token and attaches to it (a precursor to the Job Select mechanic from the Final Fantasy set)