Incarnation of Faith enters the battlefield with X +1/+1 counters on it.
When Incarnation of Faith dies, all creatures you control get -1/-1 until end of turn, for each +1/+1 counter that was on Incarnation of Faith.
Our hopes, and lives, go with you.
See Challenge # 156.
Picked faith purely as the first on the list that wasn't yet taken.
Huh. Incarnations are loved by fan card makers; but really really rare in real mtg. Only personal and Feral to base off of.
Personal is, of course, "I send part of myself out to do battle"
Feral, seems to be similar; but for your creatures. They exert themselves a bit, and send out creatures to fight.
So. Faith goes out to do battle.
And in mtg faith is... toughness maybe? Lifegain? Protection? I think I'll use toughness; since Wall of Faith is the most directly physical manifestation of faith.
So. Spend some toughness, and send it out to fight for you.
And, oddly; this is now kinda like a pestilence. So it's probably a black incarnation.
Hmm; doesn't feel quite right. Let's make the toughness cost happen after the incarnation leaves - that's much blackier.
And yup - you have to trust this incarnation is gonna do the job. Because if not, it'll eat your army.
There are a fair number of Incarnations in real MtG; they just usually have one-word names, without "Incarnation of". There's the original cycles, Valor/Wonder/Filth/Anger/Brawn plus Glory and Genesis; then there's the Lorwyn cycle Purity/Guile/Dread/Hostility/Vigor.