"EB03-006 Nami" has an [On Play] effect that requires changing your Leader's power to 0 in order to draw a card, but this is not a problem with "EB03-001 Nefeltari Vivi"
Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand
Probably not
This is a small thread to pull in a more complex body of work, but its my favorite thread
The Green Tutors Between Green Sun's Zenith, Chord of Calling, Invasion of Ikoria, and Finale of Devastation, there are tons of X-spells in green that tutor creatures directly into play, some pulling from the graveyard, too
In Commander 2020 , colorless artifacts have a nice floor: every deck comes with a Sol Ring and, more importantly, an Arcane Signet, which are two of the most played cards in the entire Commander format