TheChirurgeon: I *think* the answer is some kind of affinity/cost-reduction shenanigans, but you don't really need Prompto for that
Eligeth's transformation of scry effects into card draw, combined with Siani's scry-triggering attack alongside other fliers, creates a consistent card advantage engine
In Standard she seems a bit too slow to contend with Jeskai Prowess, but if a deck emerges that can survive long enough to get her into play, she's going to offer absurd midrange value
Remember, the world of s is competitive, and being proactive can lead to successful finds
Once an action card has been used, it goes into the players discard pile face-up
Weve only seen a handful of reprints of this mechanic since the Theros block and its possible well never see it printed again given the other options available