except none of those is serious enough for what I would assume your purposes are, I'm afraid: Lowland Oaf Ravenous Giant Another card that might fit better is Nissa's Defeat, which seems to fit halfway on both the visual and "Pause, surrender, letting go, new perspectives" angle (although of course, Nissa would be a "hanged woman")
With the number of artifacts, enchantments and planeswalkers decks play varying wildly you cannot really abuse an ability to remove them in green as you cannot play more than a couple of such effects in a main deck
Vintage Cube is more or less the fast mana format, and its easy to understand how one player having access to six mana to the other players four can lead to all kinds of snowballing advantages
Some companies allow you to make an appointment to drop off cards for in-person grading
Aside from the booster box effect, Japanese cards are often easier to grade