Well, Swamp Hag is pretty close to a Duration card I had created, so that feels cool. Except that I shot down my card for being too rude in multiplayer. Swamp Hag's apparently still "grim", but hopefully not as annoying as her cousin. Also, interesting to note that Swamp Hag has no benefit for you the turn you play it. Also, is that first line justified?
Amulet seems like almost like a Steward split over two turns. It seems, in general, weak to me. But like everything, it depends on the Kingdom; if this is the only trasher, you can bet I'm getting some. I have faith in the playtesting, though, so it's probably not all that weak. My reaction about the power level is reminding me of Loan.
Has no one compared Hireling to Caravan? Seems apt, imo. You get none of the on-play bonus, but in exchange the Duration part happens forever. Also, Hireling has my favorite art of the three cards here.