Since it has X in its cost, it can scale it up and cast it at any point in the game
The gist of it at current, however, is this: The Phyrexians have invaded Dominaria and have installed sleeper agents in every part of the plane, into every class and species in and out of society, and they've even turned some of the beloved legendary characters from the story into sleepers as well
Since there's no better source than the actual emails, I'll be quoting them liberally throughout this article (in the cases where we need to reserve an idea for the future, the text will be replaced with bracketed italics summarizing it)
It has a whole slew of ways to trigger life gain, whether through a Soul Sisters strategy that lets your creatures cause you to gain life when entering or by granting life gain or even through limited-use alternate triggers
Getting a boost to commander damage is even better
Theyre most popular in Commander where their ability to amass a massive board presence with high power and toughness values makes them very difficult to beat
