What it does
I'm not familiar with "My Will Be Done" as an official Magic: The Gathering keyword or ability. It doesn't appear in the comprehensive rules or on any card I can verify, so I'd be guessing if I tried to explain its function—and giving you fabricated rules text could lead you astray in an actual game.
A few possibilities: it might be a card name rather than a keyword, a fan-made or custom card, a misremembered ability, or something from an unofficial set. If you can tell me where you saw it (a specific card, a Mythicwyrm custom card, etc.), or quote the reminder/rules text printed on it, I can break down exactly how it works, the common rules pitfalls, and its Commander applications.
If you meant a real mechanic with a similar feel—like Will of the council, Council's dilemma, or monarch effects—let me know and I'll cover that instead.
Iconic cards with My Will Be Done
See all 1 →