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Bioplasm X-card interactions are complex enough, so cards that ask me to keep track of both X and Y have to be good to be worth the headache
It seems like, rather than a lifegain themed food deck (see the Food and Fellowship Commander precon deck), Ygra is poised to benefit heavily from mass artifact destruction, which might make her a seriously annoying commander to play against
In that case, Nettling Nuisance's ability triggers once for each player that Faeries you control dealt combat damage to, regardless of how many creatures were dealing that damage
(If Leonardo, the Balance is one of your commanders, your deck may contain cards with any color or combination of colors in their color identity, regardless of who your other commander is.) Both commanders start in the command zone, and the remaining 98 cards of your deck are shuffled to become your library
If you have an idea that you know should be a permanent but are stuck on the specific type, consider what makes the most flavorful sense