From discussion on Bow of Alatar:
Does your belief allow the warrior to reassign strikes already assigned?
I think it is a terribly ambiguous card. Independent of "face", there are questions of scope and timing. While a short event, the "If" conditional implies that there is a persistent effect from playing the card. I suppose it had to be implemented this way, because players cannot normally play cards in the midst of characters being assigned strikes. However, this leaves lots of room for ambiguity:
1) Can only one warrior be effected, or can any number of warriors chosen to be the targets of strikes leverage the effect? It depends on whether we think the persistent effect lasts until end of turn or only until it has been used. Or perhaps the leading "a warrior" is meant to be an active condition target?
2) Must a warrior so chosen decide the number of strikes they will face immediately when they are chosen, or can they delay each strike choice up until the strike is faced by another?
The CoE has supplied its opinions. Ignoring those, my current state of understanding would interpret the card text itself as literally saying something like (verbosely):
"Playable during an attack before strikes are assigned. For the rest of the attack, for each strike, the defending player may choose for any defending character to become the character that will face that strike (regardless of strike assignment), provided the character was assigned as the target of a strike from the attack by the defending player and was a warrior when so assigned. A character so chosen suffers a cumulative -1 prowess/-1 body (until end of turn) at the start of the strike's strike sequence."
It was requested that I include the original card text, I think:
Many Foes He Fought wrote:Resource: Short-event
If defender chooses a warrior to be the target of a strike from an attack, that character may choose to face any number of the strikes from that attack. The character suffers a cumulative -1 prowess/-1 body for each additional strike faced. The character faces a separate strike sequence for each strike.