If it changes zones, it will either cease to exist (if it's a token) or cease to be a copy (if it's a nontoken permanent), and so you won't be able to cast it as an Adventure
Funnily, around the time that it got previewed, I was jamming a bunch of games with a Mono-White aggro deck in Pauper Cube (it may end up in an article someday) with Ramosian Rally, a card that's impressed me in the format and had emulated the "free" ability on Force of Virtue
As opposed to Tax Effects that slow down your opponent's gameplan, these cards completely stop their gameplan
Youll also want other staples like counterspells and interaction, plus protective spells
Prereleases are kicking off everywhere as of the writing of this article, and players may be interested in what Brothers War cards they should be watching out for
Just looking at those two cards makes me rethink playing Selfless Spirit in my earlier lists