Sedgemoor Witch is a constructed-focused card which means it may not see much play in Commander, but could be a good option for sacrifice strategies in constructed formats
We are excited to see you want to bring Yu-Gi-Oh
However, it is still possible to use cards with an F or earlier regulation mark, or no regulation mark at all, if that card still exists as a card with a legal regulation mark
Mono Green may not be as good as it once was, but the deck will likely still function in some way or another
We occasionally let red do it, but usually there's a short duration during which you can do it, unlike blue and black that usually doesn't have a time limit
A triggered mana ability is one that adds mana and triggers on an activated mana ability